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3.
A male douchebag that brags about things not even worthy of bragging about.
"Yo, I just benched 200 lbs for a half a rep! Top that!" - what a douchebrag!
by G Pizzle January 08, 2012
 
1.
A grade A douchebag who brags about his latest endeavor. Someone who likes getting attention and makes an ass of himself while getting it.
Ameet: "I hate it when my celebrity friends call using a *blocked* number. The downside of winning an Oscar or two."

Diane: "Ameet's such a douchebrag".
by Drinkchai July 22, 2009
 
2.
both the act of boasting about douchey things (how may girls you have slept with, beers you drank, how you mistreated/condescended to a girl, etc.) and/or the douchey manner in which it is done (lack of consideration of volume or environment in which it takes place).
Douchebrag (v.): "Johnny just got back from spring break in Cancun. I can't listen to him douchebrag for one more second."

Douchebraggery (n.)

Includes but is not limited to:

Conversing loudly in public about having sex with a girl, at a volume intended for people outside of your group to hear.

Trying to look cool by bragging about how many beers one drank, or intentional degradation of a female.

Using unnecessarily degrading terms in conversations intended to impress.
by Pierre LeBoner September 21, 2013