When two (females) going ass-to-ass and pressing, bumping, rubbing or slamming their asses together.
It's often sexually related, of the who's got the sexiest or biggest butt/ass/booty.
(competitive)
A white woman with a big booty.
A black woman with some ass-status challanging her on a assfight.
Jake ripped ass last nightmid sentence and just carried on talking as if nothing happened. It left me doubting everything. I’m sick of guys asslighting me!
Asslighting (noun): When a large ass first appears smaller than it actually is, causing a person to question their own memory or sanity. See also: Ass illusion, thicc trickery, booty mind games.
Don't let the Spanxfool you; it's all asslighting, bro.