sloppy gillapi 

when one disposes fecal matter into a cup and smears it onto another persons mouth.

"I'm about to give you a sloppy gillapi."
"Remember that time they gave that kid with the long blond hair a sloppy gillapi at that party after he got that carrot shoved up his ass, that was so funny."

sloppy gillapi by Dave Gregerson April 18, 2008