Top Definition
A person who has recently began lifting weights, acquiring minimal to some muscle definition, and feels the need to show off by wearing tight-fitting short sleeve shirts and tank tops - even on cold days.

Similar to new money.
"Damn, it's gotta be like a 40 degree day out here."
"No shit, and that mother fucker over there is wearin' nothin' but a wife beater. He's gotta be new muscle."
by speaks4 April 02, 2008

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