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2.
Person who is a poser, but also does a poor job of trying to emulate the style, fashion or activity.

Portmanteau of "poser" and "douche-bag" or "scum-bag" or even "trash-bag".
Mike just bought the Kayne CD and the next day he was wear wearing bling and showing underwear instead of his usual three piece suit. What a posebag.
by don't use air conditioning July 16, 2008
 
1.
n. a loser who is such a poser that he's as bad as an entire bag of posers rolled into one, hence a "bag of pose"
No matter what you say, that posebag will agree with it, all tryin to be your friend and shit. Let's see if we can get him to say he loves men.
by EmperorKO February 17, 2003