Soggy Biscuit

A game played by teenage schoolboys in Britain wherein everyone violently jerks off onto a single digestive biscuit at the same time, and the last person to bust has to eat the biscuit. Most commonly played at sleepovers or school trips.

Lads, want to play soggy biscuit?
Soggy biscuit is actually grim
Wheyy, you have to eat the soggy biscuit