A denim or leather jacket worn by metalheads to show their devotion to the best musical genre on earth.

The denim kind are usually sleeveless. The leather kind are usually a converted biker jacket.

It is covered with sew-on patches with the names/logos of favorite bands. There is usually also a large backpatch covering the back of the jacket, with almost all the available space left taken up by smaller patches. Studs and/or spikes are optional, but they aren't punk jackets so don't go overboard.

Some may smell a bit due to being worn exclusively in moshpits where it can get sweaty at times.
Metalhead 1: Your battle jacket is awesome!
Metalhead 2: Yeah I know. I dare you to smell it though!
by Andrew Melvin April 21, 2008
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Piece of clothing or wearable accessory that conceals a water canteen. Used in harsh environments where dealers want too much money for a bottle of water and you won't make it thru the day without it. Safe sucks.
Concerts and events where the security folks won't let you in with your own drinking water supposedly for "security" reasons but really just to jack corporate sales of teeny bottles at 4 bux a pop. Just bring your Dune Jacket so you don't get gouged and you don't get sick either.
by Chris0101 October 26, 2007
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Clothing that hides a canteen. Used in harsh environments where dealers want too much money for a bottle of water and you won't make it thru the day without it.
Take a dune jacket to the rock concert. They won't let u carry in the door.
by Chris0101 November 19, 2007
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the wasps that fly around garbage, follow you around and buzz in your face for at least 5 minutes, fly into your car window and make you almost shit yorself, and sting you just for fun because theyre assholes. these fuckers are nasty, and look orange at a distance and hover in circles around wherever they are, and if you get near them, they will fuck with you until you can wave them off without getting stung. they also like flying into peoples houses. fortunately, they are easier to kill than flies, but are still annoying as hell, and can even be scary, especially when youre driving a car, and they fly into your window and start flying around in front of your face or land on your junk, recipies for disaster.
there was a giant wreck tying up traffic on the highway. some dude had his window open. a yellow jacket flew in, and stung the guy in the face, then he slammed into another car, and ther traffic behind them piled up and nailed them.
by stangorino281 September 23, 2012
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A reused condom
We wanted to fuck again and I used my last condom, so I had to dig in the garbage for a dirt jacket
by KePhKo March 27, 2015
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The bunching up of a zipper so it appears as if you have an erection protruding from your jacket.
Jim had a jacket boner and we laughed at how small it was.
by Trevor Cobbs March 25, 2008
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Holy shit it's so cold out here that my dong has become a popcicle! I wish my parents didn't take my meat jacket away when I was born.
by Mike and Chase January 14, 2008
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