Top Definition
When Bill Hopp JR. thinks something is hilarious, the term PMFAO will be given in place of "LMFAO"
PMFAO: Popping My Fucking Ass Off.

Bill likes popcorn so much, he has to "Pop" his ass off.
Bill Hopp JR. looks at a GFS Snow map in the middle of January. It shows a 3 foot blizzard for Baltimore.

"PMFAO he says! It's going to happen because JB mentioned it earlier"
by Dah Weather G July 02, 2013

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