Definitions by KitchenerRanger

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!

Rival Fullum by KitchenerRanger February 1, 2010