Stands for acidic pussy juice. A disturbingly rancid fluid leaked from a mothers vagina. This is particularly gross on a hot summer day.
Yo man, tell your mom to clean up that APJ or I won't be swingin by at my normal time.
When a man's penis recieves pleasure by the movement of a hairy or stubby arm pit. Preferably a female armpit. (armpit pit job).
Hey guys it turns out my girflriend hasnt been shaving her armpits for the last few weeks so she could give me a wicked A.P.J.!!
Stop typing in ebonics. if you actually speak like this then you need to go to school.
YO FOO FO SHIZZO MAH DUH WHUT WUZ AH SAyen? YOU AM STOOPID.