look up any word, like fuck boy:
(1) when a big man is hitting it from the back his belly has to go somwhere.
(2) when dancing or holding a woman
(3) when passing by someone in a small space.
B.O.B. Belly On Back. Man the other night i was deep inside this girl. I was b.o.b.
by dj5dolla_holla May 22, 2011