f.f.y.a.
f. f. y. a. is when you stick your fingers in someone's butt so hard it feels like they're getting a tattoo.
I did f. f. y. a. to my brother and he said it was better than his video game.
My mom did f. f. y. a. to my dad and he cried like a baby.
At the gym, the guy next to me did f. f. y. a. to his girlfriend and I had to leave.