One who boasts about his accomplishments. Usually associated with the term meat-head and or tool. One who puts shirtless pictures of himself on facebook trying to impress the ladies and or dudes. Most douchebags lack girlfriends or undeservingly have an extremely hot girlfriend. There really isnt an in-between. Uses terms like "big, huge, or ripped" when describing himself or "bro, or broseph" when talking about his pals. Usually does not realize his douchebaginess, and thinks he is being cool or impressing when really he is just making himself look like a moron. Usually referred to as "THAT GUY" when outsiders refer to him in response to his douchebaggy behavior.
"I love working out, drinking beer, showing off, and getting my tan on"- douchebag