Bum dust

Bum-dust: The bit of V shaped residue left on the back of a toilet seat after a poo.

Commonly containing a mixture of underwear fluff, skin and pubes.

Ffs Andy! You've left bum dust on the toilet again!

by Sgt Poopybutthole June 10, 2022

Bum Dust

The little bits of weed left over at the bottom of the bag.

"Dude, all I got is like..a bowl's worth of bum dust.."

by B.Luv January 13, 2009