The act of anally assaulting a girl whilst drinking a protein shake, upon completion of drinking the RTD protein shake the male proceeds to place his penis inside the club rats vagina and the protein shake bottle in her gaping butthole.
"dude i protein shaked this girl so hard last night, she wont need her fiber supplement for a week, I fucking love protein shaking!!"
by antony2 August 18, 2014
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-Yo, she really took your protein shake?
-Hell yeah! She swallowed like a pro!
by ripR1 August 16, 2008
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The Sexual process of masturbating a male and catching the semen in your mouth.
Hooker: I like to keep myself healthy by enjoying a protein shake right after a heavy workout session.
by Jared Ellis March 09, 2008
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"Last night Amber swallowed a big cup of my protein shake. She said it was deeeeee-liscious!"
by B.Diddy August 02, 2007
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A sexual act in which one person shoots jizz (a protein shot) into the other's mouth and then shake their head vigorously.
Gwen: "Let's get out of here and grab a beer."
Richard: "Are you insane? You know my midterm and finals ritual. I study til 11, 9 solid hours of sleep, protein shake in the morning."
(from 'Van Wilder')
by Nick D February 26, 2004
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In the world of strength-athleticism, supplements for growth are often used. Protein shakes are powedered substances which are mixed with milk, oragange juice etc. to produce a drink apporoximately 70% protein.

consumed after exercise, the protein rebuilds the muscle bigger and stronger.
by Kung-Fu Jesus April 17, 2004
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