look up any word, like kappa:
 
1.
When a women has become overweight to the point of having a large, sweaty, cheese producing flap or roll of fat hanging down over her puss.
Check out the poon flap on roseanne.
by matt March 28, 2003
 
2.
poon meaning pussy and flap meaning....flap
her poon flaps are so big, u could use them for a blanket.
by lisa moon May 07, 2006
 
3.
just look at your mom's snatch... you'll know...
Oh my fucking christ, your mom has some gnarly poonflaps.
by fat fucking penis March 21, 2003