A term used in prison that is a form of prison rape in which a homosexual (usually black) man in prison at the showers telling a heterosexual male (usually a new inmate) to pick up a bar of soap that he "dropped" by accident. The gay man will say "pick up the soap" in a fierce way, in which the straight man will pick it up with his ass bending to the other man's penis. This indicates that the straight man will be anally raped.
Prisoner 1: Yo nigga, I heard the new inmate just met Big Smoke.
Pisoner 2: Yeah i heard, he suffed from "pick up the soap"!