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If someone has disco muscles its means they are a guy who only trains his biceps, pecs, and abs. People with disco muscles normally wear a t-shirt one size too small, and have a hunched over appearance because they don't workout their back.
girl one: look at that guy, he's hot
girl two: naw, he only has disco muscles
by anonymous6737 January 31, 2009

Words related to disco muscles

disco fit muscle muscles party tight t-shirt