A combination of the words jackass and douchebag. Normally used when a person (or persons) display characteristics of both afore mentioned words...

In other words, a stuck up person (commonly referred to as an asshole) who does stupid things to get attention
Did you just see what that jackbag did? He dry-fired that brand new compund bow trying to show off for his girlfriend...
by Warlock Witt September 16, 2003
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(Noun)The virtual location in the cerebral cortex in which a masturbator solicits their historical fantasies to initiate and sustain the human orgasmic process to completion. The capacity of the jackbag is correlated to sexual experiences and history of the owner. Items may be subtracted as more prominent, more pleasureable events are placed there.
1. Joe had it hot with Sally.
Now on his own, he reaches into his "jackbag" to revisit his memories with her to begin his self-love. Joe has moved Betty and Trixie out of his "jackbag" to make room for Sally.
2. I couldn't sleep last night so I reached deep into my "jackbag" and had a splooge-fest that knocked me out.
by rburban November 12, 2008
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A bag-like object or some other container in which an individual frequently ejaculates in. More often than not used as a dismissive name.
"I was cleaning out Todd's room the other day. I picked up a sock and examined it closely - it turned out to be his jackbag."
by OEP December 17, 2007
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Referring to a sock that a male has used to catch his sperm during masturbation.

also

Slang used as an insult comparing someone to a sock that a male has ejaculated into during masturbation.
guy1: That dude is nasty!
guy2: No kidding he is a real jackbag!
by MrFun May 20, 2010
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noun, referring to a person the speaker is unfamiliar with but who has quickly and unmistakably distinguishes himself as either a jackass or a dickbag. Used when the speaker is as yet unsure which insult best fits the recipient.
Who are all these jackbags that Google+ is suggesting I circle up and hang out with?
by wordsaremycraft July 22, 2011
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Noun; A cross between jackass, from Old English and the German word for jerk, douchebag . Can also be used as an adjective to describe a dick move.
In response to a stupid act, Matt asked, "Why are you acting like such a #@$&%ing jackbag?"

"Altman, I can't believe you did that in that bathroom, that was a real jackbag move of you!"
by G. Kahn March 31, 2008
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One who makes an ass out of them selves or one who doesn't care to make a valid impression but chooses to degrade one's own character.
Kanye West's behavior at the VMA Awards is the epitome of jackbag behavior
by OpusDJ September 23, 2009
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