"Oh white boy, I'm bout to nut."
"Nut a fat warm black load in my prolapsing anus."
"IM BOUT TO NUUT!"
"CUM IN ME MY NIGGA!"
"What did you just say white boy?"
(For the next 7 hours you get violently raped by a angry 6'6 black man with a 9 inch girthy penis)
Its when you Cum/pre-cum Inside yourself and become Gay Which then turns you gay. You also have help with it by getting a handjob from a girl or man. both is very good.
I Cummed/pre-cummed inside of myself Yay!
Man/girl: Awesome, Now do me!
CumInMe Means you have Cummed inside yourself