Assinosis

The tingly feeling you get in your butt after sitting for a long time. Also know as your butt falling asleep

We gotta get out of this car for a bit. I have a bad case of Assinosis.

Assinosis by Joonas4321 September 12, 2015

assmosis 

When two people engage in anal sex.

(called "assmosis" because the two lovers are absorbing each other's pleasure as they bump their ends)

Derived from the word "osmosis."

Okay cowboy, let's go make love on the couch via assmosis.

assmosis by Mark H May 22, 2004

assmosis 

the process of one's butt getting bigger just by standing beside those with bigger butts.
People with fat friends get bigger butts just by being around "fat asses"

Julie's butt got bigger every time she was near Jane because of assmosis.
I can't help that my ass has gotten bigger; it was assmosis.

assmosis by Serena Peterson January 3, 2009

assmosis 

the gradual or unconscious assimilation of ideas while sitting on one's posterior in a classroom setting

While sitting and listening to the long lecture I seem to have retained much of the content by the process of assmosis.

assmosis by herbybell April 3, 2010

assmosis 

the process of one's butt getting bigger just by standing beside those with bigger butts.
People with fat friends get bigger butts just by being around "fat asses"

Julie's butt got bigger every time she was near Jane because of assmosis.
I can't help that my ass has gotten bigger; it was assmosis.

assmosis by Serena Peterson January 6, 2009

Assmosis 

It’s when a shit sits in a toilet bowl for too long and starts to dissolve and turn to shit water.

AJ: My fucking roommate left a shit in the bathroom this morning and I think it was clogged. I swear when I come back, it better not be there.
Isaiah: Nah, it’ll be shit water. What’s the term? Osmosis?
AJ: Assmosis

Assmosis by MotherfuckingSatan August 27, 2019

Assissist 

Someone who is extremely obsessed with ones own bootycheeks

John: Are you checking yourself out?

Stacy: No I'm checking my ass out

John: Wow you're a narcissist

Stacy: No I'm an assissist

Assissist by pussi hunt3r May 13, 2022