assninja 

One who is stealthy like a ninja, jumping from one ass to another (usually raping them, usually a gay ninja too).

They could be a figurative assninja, or a real gay ass ninja!
The latter would dress up as a ninja, with stars and everything, and perform ass sex with kunais, advanced forms of taijutsu, ninjutsu and genjutsu.

They are to be feared when they possess a sharingan!

John walked oppenlegged, ass bleeding out of his bedroom this morning. He had a swarm of assninja's on his back all night, and won't be able to sit for a month now!

Yeah, one of the rapists was Gay-Sensei

assninja by Fukaface! March 26, 2019

Asininestein 

Someone who thinks he is smart but is actually very stupid. A "know-it-none" as opposed to a "know-it-all". In particular, people who assume their success in one area entitles them to respect in another. (etymology: a portmanteau of the words "asinine" and the name of the bona fide genius "Albert Einstein" - coined by former Jeopardy! writer Ryan Hopak.)

"Glenn Beck spews so much bullshit he's the ultimate asininestein.", "The character Cliff Clavin on the sitcom Cheers was an asininestein."

Asininestein by Corpania October 8, 2009

ASSING AROUND 

A person who is goofing off wasting time in a very relaxed haphazard way.

"Mario if off assing around" or "Gilbert is at the mall assing around"

ASSING AROUND by VINNY TUFANO December 25, 2007

Assinaise

Using Mayonaise in place of lubricant

Where's the lube? Gotta go to the fridge and use the next best thing - Mayonaise

Mayonaise + Lube = Assinaise

Assinaise by Astam Outh August 19, 2009

assin' it up 

Acting in a manner consistent with an ass (either a jackass or just an ass ass). Braying arrogantly and assishly. Producing excrement when one acts or speaks. See Donald Trump.

"I see Trump was on Twitter again in the wee hours, assin' it up!"

assin' it up by SusieSweetCheeks November 17, 2016

assnime 

An anime that is so bad, that it is literal ass.

Person 1: Man, Kenj no Mago is an awful anime.

Person 2: Anime? More like assnime.

assnime by Makushi May 2, 2019

dick assing around

One who cannot get the lead out of thier ass.

One that takes forever to do something; A slowpoke

One that cannot move because its as if they have a dick up thier ass.

A more colorful term for a dipshit.

It took forever to get through Walmart checkouts, because the clerk and person in front were dick assing around.

Person A : Sorry I'm late, I was driving behide someone going 20 and the speed limit was 55.
Person B : Yeah, don't you hate it when people dick ass around and you can pass them.

dick assing around by meijer2000 November 19, 2009