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The time when a girl is on her period
I would do you, but your moppin so i'll get a prositute.
by zab123 January 28, 2010
1. When you're really fucked up and you try to say "muffin", it sounds like moppin.
Sober person: "Hey what you eatin'?"

Pothead: "A moppin..."
by D-Suicide May 22, 2008