Arm Poppin
It is the act of making love to someone's armpit.
Dave: Guess what happen last night.
Jim : what?
Dave : I ask Jill if I could put it in your butt, she decline but instead I fucked her in the armpit.
Jim : you went arm poppin last night.
* high five*
Jim : what?
Dave : I ask Jill if I could put it in your butt, she decline but instead I fucked her in the armpit.
Jim : you went arm poppin last night.
* high five*