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1.
a.female version of a blumpkin.

b.eating a girl out while they poop.
i gave that bitch a flapkin and she peed in my mouth.
by iloveblumpkinsfromhobos December 21, 2010
 
2.
to get slapped in the face with a dick
i flapkinned that chick
by Ae416 September 12, 2012
 
3.
the excess fat on a napkin
i farted on the flapkin
by AJizzzzzzzzzzzzzzza March 01, 2008
 
4.
Sanitary napkin for a chicks with big pussy lips.

That fat bitch is bleedin like a stuck pig.Get her a flapkin pronto.
by Bwa007 December 07, 2007