The word's original origin comes from wine brewers. "Dregs" or "lees" were the words applied to the wine residue during the aging process. "Dregs" also comes from the grammatical base of the word "dark".
2. Tanto: "Shoot 'im! Shoot 'im!"
Tanto: "It's on safety!"
The verb "to dreg" describes dreg-like behaviour such as sleeping one off on a park bench or casing parked cars for easy break-ins.
(The Slang Definition) 1. A word used to describe someone who is less than desirable in the eyes of common society. See also outcast.
"I hate that group. It's full of dregs."
I was DREGed from my classes for non-payment.
The system will be DREGing students on Monday for non-payment of classes.