Definitions by HalfTobotHalfCop

Bisk 

Dried up and crusty semen. The residue found on dried masturbation tissues which haven't been properly disposed. Often found on the inside of underwear due to premature ejaculations

We knew Johnny had masturbated that day. There was bisk all over his trousers.

Bisk by HalfTobotHalfCop March 11, 2014