Fullum

To shit in someone's peanut butter. Normally done surreptitiously at a party.

Whoa, can you believe Rival pulled a Fullum at that dude's house? He's gonna have some real Nutella when he has breakfast tomorrow!

by EnzotheBaker February 1, 2010

Rival Fullum

To leave a long-lasting gift to your party host by shitting in their peanut butter. Always followed by casually replacing the jar on the shelf where you found it.

Oh man, there gonna get some real Nutella when they see that I pulled a Rival Fullum in their peanut butter!

by KitchenerRanger February 1, 2010