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1.
sarcastic, bitingwit, banter, jocular, sarcasm, sardonic.
He said you said it was OK, What, the sarkymonkey.
Don't believe him, he's deadsarky.
by Teddybuoy November 05, 2005
 
2.
short for sarcastic
commonly used by the Irish
"You sarky cunt!"
by FukinFATkid May 11, 2003
 
3.
It's basically short for Sarcastic.
Amy: You are soo In love with him

Anna: Now your just being Sarky!
by AnziePansie August 12, 2008