In the UK - drinking game for naked guys, usually rugby-football players. Needs three guys. One guy bends over with his ass in the air. Another pours a can of beer from high up so the beer trickles down the first guy's ass crack and over his balls. Meanwhile a third guy holds his head between the first guy's thighs and the beer goes in his mouth and he drinks it.
I can't believe they were chugging after the match.