I think faster than I talk. I'll start talking and skip words without realizing it sometimes. But...there were times...

One time in choir class, we were all working hitting the same pitch. We did, and I felt my binder vibrate. When we sat down again, I went to say "My binder was vibrating!" to the girl next to me, but it came out "My vibrator was binding!". She gave me a funny look, as did the guy sitting in front of me. I quietly corrected myself, but I'm pretty sure my face went bright red.

Another time my sister was pissing me off while I was trying to play a game. She wanted to have chocolate milk, but kept on complaining that the milk smelled bad, even though that was the day OF the sell-by date. Finally fed up with it, I yelled at her "Of course it smells bad! It came out of a horses uterus!" I tried correcting myself, but it came out as "Wait...Cow's uterus! No! Cow's udder! The udder, damnit!".