A WAP means "wet ass pussy" but the term has now developed and is now targeting a larger group of genders. That's why the WAP now also means "wet ass penis" and it is used when a male has some juice ass genitals.
My homie used his WAP in a Squirtle, and it was a blessing.
Wine and Pizza, you sickos.
"Hey, did you get some WAP tonight?"
"Yes, it was delicious as always!"