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 September 25, 2008

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