1 definition by angelD2010
The girl is upside down with her head hanging off the bed/couch and she is giving the boy a blowjob. When he cums she keeps it in her mouth and proceeds to spray it all over his body, hence the topping on the cake.
Boy1: dude, why are you all sticky?
Boy2: girlfriend tried something new, the upside down pineapple cake!
Boy1: you need to end that relationship asap.
Boy2: girlfriend tried something new, the upside down pineapple cake!
Boy1: you need to end that relationship asap.
by angelD2010 March 9, 2009