When you go to reach for something from a
chick and they move and you "accidentally" grab their
boob. This also works with really
fat guys.
Nathan:
Hey Kim, can I see that picture you're holding?
Kim: Yeah, sure, you just have to reach in front of my REALLY BIG BOOBS to get it.
Nathan:
Okay! (a little too enthusiastically) Whoops, I that was an "accidental" boobgrab.
kim: Well... it looks like you're gonna have to try again!
*Some Random Person: Crap, I just boobgrabbed Peter
Griffin!*