When refering to rock hard tits that are protruding from a ladies brazier; when a woman jumps and her boobs arent affected by the reactionary effects of gravity.
dude did you see the cafeteria lady today? her knuckle tits were bustin the seams
(while watching a 70s porn) dammit man, they just dont make em like they used to, shes must have pure steel loaded into those mammoth cannons
person 1) have you felt those knuckle tits yet
person 2) boob job gone bad man
person 1) it got a little weird didnt it
(while watching a 70s porn) dammit man, they just dont make em like they used to, shes must have pure steel loaded into those mammoth cannons
person 1) have you felt those knuckle tits yet
person 2) boob job gone bad man
person 1) it got a little weird didnt it
by thenorm March 02, 2011
When you make a fist with your hand and u rub the knuckles on the frame of an asswhole or in the ass.
by Uk36yeahaight March 03, 2019
by Sneepers March 26, 2011
Dried semen. When remnant semen dries on the fingers after fapping and busting a thick nut all over the hand.
Is that dried skin on your fingers?
Naaahh. I just didn't wipe my fingers to good after fapping this morning. It's knuckle crust.
That's fuckin nasty braaaahhhhh
Naaahh. I just didn't wipe my fingers to good after fapping this morning. It's knuckle crust.
That's fuckin nasty braaaahhhhh
by Eaton Holgoode May 09, 2017
When a man is wearing tight pants and the crotch seperates his testicles showing a bulge on each side of the seam.
by Otis The Duke January 26, 2009
by Wizz kid January 24, 2009
by jersdunz September 20, 2012