Should never be used as an agreement, as one might use word or boom, because that might imply a degradation of one's superiority.
John: Wow, that girl I saw you with is pretty hot!
John: Hey, check out my new kicks. Aren't they cool?!
Kramer- Yeah I heard she loves balls in her mouth.
Steve- Wow I just totally got BIM right there.
Kramer- Yeah you totally missed that basket-ball shot, so balls in your mouth.
Tony-HEY STEVEN. HEY KRAMER.
Steven- Tony huge BIM.
Tony- What does that mean?