The sexual violation of a white man in prison by blacks for sport. Often implemented for the purpose of punishing or humiliating the victim. Commonly abbreviated as "PB".
Eh, mang...did you hear about the white boy from cell A24 getting PB'd? Yea! Last night he got prison blacked by like 4 guys!
When you try to purchase an amount marijuana or crop from someone when someone else enters the room or area that is disapproving of the purchase. You have been crop blocked, like cock blocked, but while trying beef up your stash.
Man, I was trying to score some good nugs at a good price and he walked in the room and totally crop blocked me.