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Adjective: Male body type characterized by extensive lean muscle on a thin frame.
"I'm gunna kick that motherfucker's ass!"

"Just be careful man, he's skinny but he looks pretty skinny-jacked."
by mattCaps November 13, 2008
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When you are skinny and small in size yet still remain to be full of muscle. You are skinny but at the same time very cut and ripped.
Dude did you see that Soccer player?

Yeah he was "skinny jacked".
by fabricatefrog March 07, 2012
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