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1.
really really drunk. Like, so drunk.
Dude, I heard you hooked up with Sophie last night!" "Omg, I was so sifted-i dont remember anything!
by troatking February 12, 2011
 
2.
Another word for pissed off, rattled or just angry
man hes sifted or man im sifted cuse i faild my test
by -dil December 10, 2008