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1.
A state of complete drunkenness; a more fervent form of wasted. It is often succeeded by a number on a 1-10 scale to
indicate the level of said quastedness.

History: It is derived from a series of typos which turned the statement "I am wasted!" into "I am qasted9" - the exclamation point was turned into a 9 during intoxication as a result of inordinate usage of the iphone touchpad keyboard. As a result, a 1-10 scale proceeds the word to indicate the level of drunkenness; 9 being anything short of being rushed to the hospital for alcohol poisioning. Over time, "qasted" was adapted to "quasted" to better conform to standard English rules.
Example 1: After chugging a bottle of Jose Cuervo, the man found himself locked in
a bathroom spewing projectile vomit on all four walls while clutching his cell phone in hand proudly texting his friend "I am quasted9" before completely blacking out.

Example 2:

Guy 1: You had sex with another dude last night? How drunk were you?
Guy 2: I was about quasted6, maybe quasted7.
Guy1: I'd have to be at least quasted9 to fuck another dude.
by Ziggy Zinfandel II August 18, 2008
21 9
 
2.
Synonymous to Inebriated. When a individual, especially underaged, becomes excessively intoxicated as a result of the consumption of alcohol; namely beer, liquor or mixed drinks.
Fuck yes! My I.D. worked-T onight we are going to get quasted
by Ellie Colley May 19, 2005
6 2