ass gravity 

Term used when climbing (indoors or outdoors) and having enough lower body weight, especially in the posterior, to make it difficult to go up and over outcroppings of (sometimes fake) rock. It is especially used among women who have a lower center of gravity and additional layers of fat (especially in the butt region) than men.

Used in phrases such as "Damn, my ass gravity will not let me up and over this overhang!". Or, "I'm really tired and my ass gravity is not helping".

ass gravity by xymox1010 December 2, 2010

Ass Gravity 

ASS GRAVITY
(ass)

noun NORTH AMERICAN vulgar slang
noun: ass;

-a person's buttocks.

-women regarded as a source of sexual gratification.

(Grav•i·ty)
noun: gravity

PHYSICS
-the force that attracts a body toward the center of the earth, or toward any other physical body having mass.

(ASS GRAVITY)

Noun

Psychology/Sexuality

-the intense, unavoidable and irresistible attraction of ones eyes towards a particularly amazing booty, esp when paired with yoga pants or other form fitting clothing. Like actual physics, smaller bodies (eyes) are drawn to larger ones (booty), much like a pair of comets to Jupiter.

See also: #whitedwarf (small, white, still well rounded), #redgiant (of the larger red head variety)

Wife: “why are you staring at her ass?!?”
Me: “I’m not. Her Ass Gravity just brought my eyes into orbit.”

GF: “Slow down! You’re going to quick”
Me (from behind): “Sorry. It’s just that your Ass Gravity makes for a quick re-entry”

Ass Gravity by ironphoenix19 March 19, 2018

Gravit-ass 

when the force of having to shit is so strong that gravity has become a factor

I tried to wait until lunch break but the gravit-ass of the situation was so strong that 1 made the 100 meter dash to the bathroom early

Gravit-ass by Jordo16 July 9, 2018