Someone who attracts attention, but is actually a loser.

It can be physical - like a heatbag who wears cutoff shirts and expects you to look at him. But reallly he looks like a fag.

It can be psychological - Like someone saying, "yo bro, i just dropped 3 g's on my civic" Fact. He did not spend 3 g's but got a deal off one of his bros.

Origin- someone who drives around in the winter with their windows down blasting music - all while pumping heat in the car so they don't get cold - Heatbagging
Hey guys, look at Tony he's busting out his gay dance moves in front of those girls and he thiks hes actually gonna pick up - What a heatbag
by CSI- THE November 7, 2011
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Someone who talks an immense amount of shit, usually behind someones back. Causes a lot of unnecessary drama and unwanted attention. Heatbags are usually guys named Edgar.
Joe: Yo did you hear that Edgar punched his own teammate?!
Chris: Yeaaaaa What A Fuckin Heatbag
by Tunechii November 4, 2016
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Someone who is intentionally or unintentionally ruining an activity by unnecessarily worrying about getting caught.
Josh was killing the vibe by being a heatbag.
by Cally18 November 27, 2015
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