Slot Machining

Slot Machining, also known as Dick Cracking, is when the male genitals are pushed down in a certain way causing a ligament "crack" sound and forces the penis to bounce back up like a Slot Machine lever.

Slot Machining feels good, try it.

"Dude, I was having sex last night with Lyndrid and I got Slot Machined!"
"What the fuck is Slot Machining"
"Yk when your dick cracks and bounces back up."
"You're fucking weird, dude."