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The act of being sober or not being able to drink massive amounts of booze.
Guy 1: "Dude, I don't even remember last night because I got so drunk."

Guy 2: "Yah bro, I was grand valley'd last night so I know everything you did.. you don't want to know."
by ramsey c September 26, 2010
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Apr 28 Word of the Day
Literally everyone, ever. Including the writer of this definition.
by masokitsune January 17, 2019
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