Similar to the idiom, "Wear Your Heart On Your Sleeve" but instead of expressing your emotions freely, you (or someone else) show how much of an asshole you are.
Cal: Yeah, so I punched him in the face for taking the last slice of pizza.
Rudi: It was his birthday, assjacket.
by Master Clean January 17, 2006
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When you tie a hoody around your waist
Gawd look at that assjacket. This assjacket sure keeps my ass padded and warm.
by bgock July 11, 2008
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No word is safe from the word 'ass.' Examples are asshat, assjacket, asspants, assglasses, assscarf, assassin, asslick, asshole, assimilate, assfuck, asshead, asspacket, associated, assymetrical, and the ever-popular assmaster.
You're such an assjacket!
What an asshat!
ASSHOLE!!!
Those different looking things are assymetrical.
I chose to be an assassin on this RPG.
Wanna assfuck?
by He who likes Bukkake February 3, 2005
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1) a person who is all ass inside. Only skin covers this fact.

2) dork or nerd who ties his sweater around his waist
1) You forgot to zip up your assjacket, boss.

2) That assjacket couldn't get laid at a Star Trek convention.
by Loogy May 12, 2011
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This is the act of wiping your sweaty, quivering, pink cornhole with a chef's jacket you are about to return to a kitchen you're no longer employed at. Best if used in a spiteful manner.
"That cocksucker who fired me is wearing the ASSJACKET...I can still see corn on the sleeve."
by Jetskilz February 16, 2009
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Someone that is a dip shit. A habitual one upper, covered in a jacket of ass. assjacket Assjacket
An assjacket is a person who makes up stories that are always similar to others, yet unbelievable, just to be the one upper.
by jpizz6981 July 23, 2015
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