To put a liquid of any sort into the bellybutton of the victim, and having them suck it out. Most commonly a straw.
by TheDukeKris January 11, 2010

by WHAT?! July 01, 2005

An alternitave way of spelling "Butt Sex". Often read aloud by an unsuspecting member of the public, who will then realise what they have said.
by tits_mcgee March 01, 2008
