Brostein 

One who has been accepted into the brotherhood of Feldstein.

My best bud Evan is a Brostein.

"Whats up Brostein"

Brostein by J3WMANJI OF FELDSTEIN September 1, 2009

Brotein

The sticky white hot cocunut man pee that you shake from your bro's veiny tree of love and ingest as a hearty supplement to your daily calorie allowance.

I love the taste of Gary's Brotein, it gets me real pumped and is an essential ingredient in a Bromance.

Brotein by Pikey1079 January 8, 2015

Alex Borstein 

A plump little woman who used to be on MADtv and now writes/produces for the FOX cartoon Family Guy. She's got some big fucking tits, too.

Alex Borstein is the voice of Lois Griffin.

Alex Borstein by theicemanwillcometh January 14, 2009

Brotein Shake 

In gay slang - Semen

"I am such a dairy queen, I just can't get enough of that brotein shake!"

Brotein Shake by SubAtomicBear July 28, 2016

Brotein

A consumable protein shake your bros make you that cums from their balls

Andy: "Joseph just gave me a huge brotein shake in the shower, it was dripping off my chin."
Sean: "Damn, that mean you're ready for our workout, bro?"

Brotein by younghawks81 April 6, 2019

Brotein

A protein supplement taken by Football plays to dramatically increase chest size, add sex appeal, and look like total dicks to the Cross Country team.

(Football voice) "Dude pass some brotein, i haven't hade my 150 grams yet, im slacking."
"Have you atleast had some creatine?!"
"No."
"Holy shit, here have my muscle milk."

Brotein by Lakessss August 20, 2009

Brotein Shake 

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!

Brotein Shake by Brotein69 August 14, 2022