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2 definitions by yo_mammas_pimp

 
1.
Irritable Ass Syndrome.
When your ass is hurting and itching uncontrollably.

Also when someone is being an ass.
"Charley be pissy as hell. He must have I.A.S."
by yo_mammas_pimp April 24, 2011
 
2.
Also known as lilac and woffa.
"I can see your lilac...your bird, your woffafin
by yo_mammas_pimp April 24, 2011