A dance, associated with punk rock, invented by Sid Vicious (of the Sex Pistols). The dance is mainly characterized by jumping; everything else is optional.
The name is derived from the pogo stick.

Required: Jump!

Optional: Failing arms, kicking, thrashing, banging into people, and grinning like an idiot, or keeping arms and/or torso stiff and bouncing like a pogo stick.

Although it can seem violent to an outsider, pogo is all in fun - nothing to do with aggression - and though people occasionally get injured, those who fall are often helped up instead of being mashed by poser combat boots. It's a general understanding between concert-goers.

the thing that you don’t have when you’re phones percentage is over 20

jumping up and down to music at a concert.