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QAST means "Quality Ass-Sitting Time". This would entail time after work watching TV, drinking beer, farting etc.

Great word to use in Scrabble when you don't have a U on your rack.
Hey man, wanna go bowling tonight? Nah, I'm tired. I'm gonna go home and get some qast.
by jimmykicker June 22, 2009

Words related to QAST

exhaustion laziness relaxation rest tired