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The irritability one undergoes when needing expel fecal matter at an extreme level.
A: Hey bitch, drive faster! I gotta take a shit!
B: Dude, calm down.
A: Why!?
B: You're PMAssing is really getting annoying.
PMAss by Anonymous4456356 December 28, 2010
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Like when you're reading a FF and you want them to post soon you say "PMASAP"

-_ffluver_-: Great update. PMASAP. Loved the chapter.
pmasap by Nunya Biznez September 30, 2007