The instant muscles you get from drinking creatine and water and working out for a week or two.
Girl 1: Wow that guy is so cute, look at how big his arms are!

Girl 2: Girl, those are just water muscles.
by DrMario April 14, 2009
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Fake, puffy, watery, balloon like muscles with no appearance of vascularity or striation that are only of decent size because they’re the byproduct of massive quantities of fast food and large doses of testosterone or other injectable anabolic steroids. Typically seen among bro-type gym douches.
“Hey Dillon, sweet water balloon muscles. How much test are you abusing?”

“That guy on the bench is big but he’s weak as fuck.”

“Yeah that's because he doesn’t have real muscles, just water balloon muscles”

Kyle has water balloon muscles
by TheFassio October 27, 2017
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