I so stuff like this as well.
I switch words around in sentences (ex-I wrote with paper on the pen.). I combine 2 words (ex- if I was thinking of saying glass..then changed my mind to cup...I'd end up saying 'glap'). I also run into issues where my mind goes faster than my mouth, and I get all jumbled in what I am saying.
I also have TMJ issues (my jaw joints), so it effects my speech pattern as well... It causes me mess up pronunciation at times...so add that to my jumbled words, and I can have some serious issues talking...LoL I have to slow myself down a lot.
I can very much relate to this "problem".
Where I used to work I was the "queen" "of" "quotes".
Once when I spoke of my son-in-law the "mormon" it came out my son-in-law the "moron"...............................Funny while writing it............but it wasn't funny to me when it happened then...................
Then to make sure others quotes were on the list of quotes, I would try to write other staff quotes down when they happened............but imagine this, I could never quite remember what was said and always got that story wrong........
Then there was the time that I said at a meeting that having my boss as my boss "was a real joke"...............he never forgot that I said it either...............
Then he wrote a manual for other new hires when coming in to the office to help them relate to "special" people in the office.....................guess who was the "special" one........me of course........................boy knowing this manual was "needed" did not make me feel good........
Oh yeah, all the time. I especially substitute words that have the same number of syllables, and the same syllable emphasis- like 'hang glider' might come out 'lawn mower.'
LOL!!!!!
I do this nearly every day. So does my boyfriend (he believes he is dislexic, though he's not ADD).

GarbagePailKid,
That made perfect sense to me, LMAO. I do that same stuff as well. The topics are all linked in my mind, but they are totally unrelated to other people. I get told I am "random" all the time, but I'm really not (in my mind)! LoL, like my boyfriend will ask why I had to take my laundry to the Dr's office...he hears one conversation, even though I've gone thru a few topics.
I also lose my train of thought a lot...if I stop to think about what I'm saying...it's gone! LoL
chicx0r38474.5105208333I also do the finishing sentences with a completely unrelated topic also, but I literally slur my speech sometimes also 8)OK, when I go to talk, especially if in a more relaxed atmosphere which means often around friends, and I'm just hanging out and talking, telling a story, or excited about something when I go to speak I start off ok, like with the first word but the rest of the sentences or sentence sounds like I have a mouth full of marbles, the words all jumble up and I've noticed I often switch the syllables in the words around kind of like dyslexia of the mouth or tongue instead of the eyes.
omg, I have the same problem. I would pick the wrong words and get stuff switched around. The more I read the threads the more I realize I got ADD. All behaviors that I overlooked in the past are found here. bc girl: my wife can't do well with typing can't remember all the keys are by memory.[QUOTE=bcgirl1978] [QUOTE=GarbagePailKid]
Sometimes I make comparisons between things while talking and the comparisons are very normal in my mind but I fail to realize that nobody else relates the two items or ideas, so they have no idea what I mean. [/QUOTE]
I did this a couple of weeks ago - my BF asked me if I wanted to go out for dinner, and I answered that I was still considering joining a gym. He gave me a very blank look, laughed, and asked me what that had to do with going out for dinner.
I sheepishly explained that I made an instant connection in my mind that restaurant=junk food=weight gain=I need to lose weight=I need to join a gym.
LOL! 
OMG!!! I do this ALL the time. I didn't realize it was an ADD thing, my mind just jumps with what the person (like my husband) is saying and I've gone forward four thoughts or so by the time I respond to him. And, man! I hate having to wait for someone to finish a long, drawn out thought! shut up and let me interrupt you while I can still freakin' remember what you're talking about! LOL
wait a second here.......reizende, you hate alcohol?...that's strange, I thought I was the only person that just didn't like drinking.....
Well I have always been the incredibly fast paced, overly verbose, talk til you drop, no amount of words is too many, can't seem to shut up , can I get a word in here, do you ever be quiet, I am surprised your lips don't catch on fire...type.
And that leads to my biggest problem. When talking I seem to go so fast...like I will forget where my thought was going that I literally forget to breathe and at some point just flat run out of air...mid word... "and then the guy was running so I had to jump on the monkey or else it would have grabbed my sandwich, and peanut butte..... ( GASP!!!!) ...wow..just ran out of air...whew!...ok what was I saying?"
I also tend to type in mixed letters ...the is teh that is taht ...and mix cursive writing and print...I sometimes read what I wrote by hand and am amazed anyone can follow it.
You are not alone..
My thoughts don't fit into the template of non-ADD audiences. In grad school everyone is so calculated. They flaunt their vocab w/long, slow sentences.
But me, I have so much more to say than they do. My topics are more creative, and I can address them in more innovative ways. I offer more than jargon & rhetoric. But I hate to settle on simple sentences, knowing my ideas are assessed based in part on how well I follow the established channels of academic articulation.
But my A.D.D. mind races too fast. The act of putting creative thoughts into acceptable nouns & verbs is boring to me. I grow tired of my sentences before they're completed. So I interupt myself & start a new thought. I forget that knowing what I meant to say rarely means people actually heard it.
So then they get lost in the next idea b/c it builds upon the previous, unfinished one. I come off as inarticulate, unintelligent. Professors & other students give me these looks like they already know I'll never make it as a Sociology professor since I'm unable and/or unwilling to use extravegant sociological rhetoric to express myself.
And I feel like it's my fault I find them boring & long-winded. As if there is something wrong with me b/c I don't communicate how they do. Of course, I have to adapt to their style, their rules. They won't adapt to mine & probably couldn't if they tried. To quote Brian Wilson, "I guess I just wasn't made for these times."
speedkissdrink38499.4816319444 Some days I talk to people and though I had a perfectly eloquent train of thought, all that comes out of my mouth is this unintelligible jumble. It's not a big deal with my close friends or family, because I can just say, "ugh can't talk today"
hehe I got one,
You thinking about someone, when someone you know comes walking by, you say Hi BOB, and realise that isn't thier name but the person you were distracted thinking about. I hate when I do that, when I transfer the name of somebody on my mind into my sentence, do it all the time.
[QUOTE=Dave2u4now]
You thinking about someone, when someone you know comes walking by, you say Hi BOB, and realise that isn't thier name but the person you were distracted thinking about. I hate when I do that, when I transfer the name of somebody on my mind into my sentence, do it all the time.[/QUOTE]
I always call people by the wrong name. I've gotten better, because guys don't like being called the wrong name....oops...
And to go on a tangent... I don't know how many times I think some1 is waving/saying hi to me....and it's the person behind me....which I realize too late... LoL
[QUOTE=fourpackdad]Well I have always been the incredibly fast paced, overly verbose, talk til you drop, no amount of words is too many, can't seem to shut up , can I get a word in here, do you ever be quiet, I am surprised your lips don't catch on fire...type.
And that leads to my biggest problem. When talking I seem to go so fast...like I will forget where my thought was going that I literally forget to breathe and at some point just flat run out of air...mid word... "and then the guy was running so I had to jump on the monkey or else it would have grabbed my sandwich, and peanut butte..... ( GASP!!!!) ...wow..just ran out of air...whew!...ok what was I saying?"
I also tend to type in mixed letters ...the is teh that is taht ...and mix cursive writing and print...I sometimes read what I wrote by hand and am amazed anyone can follow it.
I do ALL of that!
My best friend is ADD also and to hear us talk is...well...scarey. We both make weird word connections, jump ahead in thought, and talk a million miles an hour. Most people just sit and stare completely dumbfounded when they hear us talk.