When you and your bro finish a hot sweaty gym session then trade blowjobs after the gym to release your tension. Added benefit of getting extra protein to fuel your muscle growth.
After the gym, my friend gave me a brotein shake straight from the tap. Delicious and my muscles are looking huge!
by Brotein69 August 14, 2022
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a protein shake with organic ingredients such as organic milk, and semen.
"after my workout today, I needed a little pick me up, so I drank some brotein shake.
by thee hammer October 8, 2007
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When you and the bros beat off into each others mouths in unison in order to form a delicate equilibrium of protein transference. A group of males can live for hundreds of years if this is executed correctly, with no need for continual sustenance from any outside source.
Bro, let’s begin the process of brotein recycling for the sake of health benefits.
by Bootydick August 7, 2019
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A brotastic beverage typically consisting of vanilla protein powder, orange juice, and Smirnoff Ice that is often consumed by a bro after a workout or when chilling at a brodeo.
Bro: Hey brosef, you tryin' to 'cube later?

Chad: Yeah brohan, let's chill right after I lax and have my brotein shake.
by n8pants September 22, 2010
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When you and your gym bro wear super tight underwear while building up hard sweat while working out to build up that hard dick stench. You need to pile up the gunk and allow it to let out its natural spunk. The tight underwear will kill off all of the sperm leaving only the nutrients in semen. After working out you and your homie will go in the locker room and shoot each others loads in your each others mouths. This is know as a brotein shake.
"Yeah I was at the gym and my bro zach shot his brotein shake in my mouth"
by Scrotum Slayer August 23, 2020
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Muscle Milk protein powder mixed with vodka. Typically consumed by Bros and Frat Guys post-workout.
"Bro, I've got to go pound my Brotein Shake so I can get swole."
by KR0N0SXx July 6, 2012
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When you add a little to much bro in your morning protein shake, it scientifically proven when one adds to much bro into their shake it is no longer classified as a mere protein shake but it becomes a brotein shake.
Son: "I accidentally put too much bro in my shake and now it's a brotein shake, i'm sorry Mom."

Mom: "You are the physical representation of a frickin mistake, Kevin"
by I'vefallenandIcantgetup May 22, 2019
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