Dandy Cupcake
The Dandy Cupcake is a foul act whereby one deposits a stool in the coat pocket of an effete man, say Lawrence Llewelyn Bowen or Boy George, which they will then find at a later date when they reach in for their Oyster card / car keys / wallet etc
"That guy over there is a right ponce, I've left him a deliciously fresh Dandy Cupcake as a gift"