1 definition by U K1LL3D K3NNY

Pre-Mestrual-Syndrome...When a girl is about to get her period and she gets pissed off at everything.
Jen- "Screw You!!!" "Go the fuck away you annoying little bitch!"

Mike- " Wow she's P.M.S.ing.
by U K1LL3D K3NNY May 6, 2010
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