bump chickens

The act of fornicating with a member of the opposite sex.

Tim: So did you and ben..you know...bump chickens?
Joe: Nah man, I'm not gay..

Liv: Oh my god. I want to bump chickens with him so bad!

Bump of chicken

A Japanese alternative rock group consisting of Motoo Fujiwara (Vocalist/guitarist), Yoshifumi Naoi (bassist), Hiroaki Masukawa (lead guitarist) & Hideo Masu (Drummer)

"Did you go to the Bump of chicken concert last month?"
"Yes, they were awesome!"