Butt nibblets Share definition Flag Butt nibblets are the small particles of poop that you find floating behind in a toilet after someone has flushed. Man Ed must have had corn last night he left a ton of Butt nibblets in the can. Butt nibblets by Captain Spanky January 26, 2007 0 0 Get merch Get the Butt nibblets mug. Buy Now — $32.95 See more merch