Hackering off - When you use your junk like a windshield wiper and you grind

When you use your junk like a windshield wiper and you grind against something stupid while you think about how much you hate your life.

I hacked off in my room because my mom told me I had to do my homework and I was mad.

I hacked off in the store while I was shopping and the cashier looked at me like I was crazy.

I hacked off in the gym and the guy next to me thought I was doing some weird workout.