Jackassish 

When someone who know starts acting like a complete jackass, when normally they're not.

Person 1: "Did you see that chick last night?"
Person 2: "Yeah, wasn't she hot, too bad she's Rachel's cousin..."
Person 1: "Rachel's my girlfriend! What's wrong with Rachel?"
Person 2: ".... Nothing.."
Person 1: "Why you being so Jackassish?"

Jackassish by StarDust August 31, 2013

Jackassing 

the act of being stupid, immature, a dick, or a jackass.

1. hey man, stop jackassing and get your ass over here!

2. Mike: Paul is being such a jackass today.
Phil: Yea, somebody should tell him to stop jackassing around.

Jackassing by mexicano9191 April 6, 2009

Jackassity 

The state or quality of being a jackass.

Jason constantly fumbled for the poor girl's right breast, only to have his hand removed, or slapped away, repeatedly. It was clear that his jackassity was not appreciated.

Jackassity by Golden Beaver July 15, 2011

Jackassidness 

Jackassidness: When an individual attains the highest level of Selfishness, self centeredness and complete disregard for anything else outside of themselves.

I am astounded at his jackassidness!

Jackassidness by Tabfan October 29, 2015

Jackassasaur 

A Jackass of epic proportions. Someone who does something above and beyond normal jackassness.

Did he just cut over in front of us to turn into a parking lot? What a jackassasaur!

Jackassasaur by Hushful May 8, 2010

pack of jackasses 

A cluster or gaggle of friggen idiots.

A Pack of Jackasses are blocking the front doors to the mall.

pack of jackasses by Ollie September 23, 2003

jackassius 

An imbellished jack-ass.

Did you see that guy cut me off?!? What a jackassius!

jackassius by John Oh April 12, 2007