Top definition
A game in which the aim is to guess whether your opponent has pulled a bit of scrotal sack or foreskin through a small hole in their pyjama trousers. Your opponent has to say "Offle Jim Jam, Cock or Ball?" before you may answer.
Female can play however, "Cock or Ball" would be replaced with the female equivalent.
Beau: Hey man! Wanna play some Offle Jim Jam? It's christmas, we can get the whole family involved!

Nat: No thanks man, I know how you fancy your cousin...
by Rawrshack November 27, 2010
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