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 23, 2009
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Qaste is used to describe food that is exceptionally crispy, crunchy, slightly brittle, a little cracky too. Qaste food does not have to be sweet, there are salty qastes too. Qaste not only describes these foods, but is in fact a whole category of foods, unknown and hidden by mainstream science.
These crispy crunchy chickens taste qaste
by Oogalee Boogalee September 8, 2021
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