abbreviated form of the phrase "pop a squat"
this can refer to an attractive woman/man sitting next to you, or on your person.
The only pap on the train had to get off at my stop, little do you know I was strangely compelled to follow her home, i had screamed 'PAP ITTTTTTTT' before she entered her front door.
by therealpapwalker September 13, 2010

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