Top definition
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
Happy St. Patties Day!
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
Happy St. Patties Day!