Yerping

Yerping is the act of wiggling your penis side to side in a fast motion. The centrifugal force is said to extend the whole penis, and it is also pleasurable. Similar to edging and jelqing, you can also Yerpmax

Teacher: Denzel! What are you doing?
Denzel: I'm Yerping, teach get with it.
Teacher: What is that all over your test...