A sexual act in which a male rubs his penis into his partner's armpit for stimulation. So named for the sound an armpit makes when a hand is placed over it and the arm is flexed towards the body.
See also armpit job, armpit sex, Armpit Choo-Choo.
"My wife didn't want to fuck last night, but she compromised and threw a fartyparty just for me."
When someone uses a baster filled with diced ghost chilies to fill their butt with the chillies and dances around the room like a naked ghost spirting ghost chillies on everyone.
Jill inserted the baster and injected the chillies and danced
"Look at me im casper the fire farting ghost" spirt spirt fart spirt
Dave sayed "This ghost pepper fart party is the best"