Definitions by Discofoot

Dirty Sensei 

When your martial arts instructor sticks his hand inside your pants, moves your cup aside, and grabs your balls, then tells you it's a legit self defense technique.

Mark got one of the instructors in a vicious hold, the instructor then gave Mark a Dirty Sensei and told him you can't do that in MMA.

Dirty Sensei by Discofoot May 21, 2019