Bum and coke 

Drug-fuelled Cottaging in a cocktail bar or other upmarket drinking establishment toilet.

Did you come her straight from home tonight?

No, I popped into the Lord Lucan for a quick Bum and Coke.

Bum and coke by cuksocker November 9, 2010

bum and coke 

to insert ones own digits in ones own anus before swirling said digit in an adversary's drink. preferably if the owner of the drink is drinking a spirit mixed with coke

I just gave that john prick a solid bum and coke

bum and coke by grubability September 16, 2009