1. Steriods in milk format, very beneficial for one's muscles.
2. Bobby's favorite beverage
"Bobby want muscle milk!"
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Male Semen, Often referred to as "Jizz"
Hey, fellow fag, lets go drink Muscle Milk!
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A thick white mans substance that comes from a mans love muscle, may also come from a womans love muscle (eg. stuarts).
"Let's get it on!!!" "Oh yeah!!!!!!!!"
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a handjob from a cheap prostitute
"hey joe i'm gonna go buy some muscle milk from your mom"