Definitions by Jackie Paper

Atom 

Ass to Other Mouth

Occurs during threesomes

Atom(tm) ...because her girlfriend's mouth is closer.

Atom by Jackie Paper June 17, 2007

ATOM 

Ass to OTHER mouth. Occurs during a threesome with two girls and one guy. Fuck her in the ass and then blow your load in her friend's mouth.

Porn or Hardcore Sex, Man pulls penis out depths of a woman's ass and immediately puts in ANOTHER woman's mouth. A degrading but satisfying act.

Bro, did you go ATOM last night?

ATOM by Jackie Paper June 17, 2007