When you take a girl's thong off and it smells like a goddamn Chinese fish market in the middle of summer. Blood immediately drains from the penis upon discovery of the Stank. Common causes include bacterial infections (e.g. yeast infection), the clap, and/or chlamydia. If discovered, immediately punch the bitch in the mouth and send her along her merry, Stanky way. Some beta male who will tolerate said Stank will eventually marry her because he cannot find a girl without Stank.
"Damn bitch, yo pussy stank is god damn disgustin!" Then punch the bitch in the mouth.
"When ya hit it from the back and ya smellin sumpin sumpin" (Stupid doo doo dumb pussy stank reference)