Dregs of Society.

Definition of dreg

1 : sediment contained in a liquid or precipitated (see precipitate entry 1 sense 3a) from it : lees —usually used in plural coffee dregs at the bottom of the cup

2 : the most undesirable part —usually used in plural the dregs of society

While searching for a photo of coffee dregs, I came across an article about uses for coffee grounds. Number 9 was an intriguing suggestion.

Coffee Dregs can be used to make a cockroach trap!