Male ejaculate fluid. Especially amongst fraternity brothers, surfers and other brosephs.
This chick was so drunk, she let me spray my Bro-tien in her face.
by Joshua J. Johnston December 24, 2007
What is Brotien? Brotien is Protien for the bros! Brotien consists of any kind of Energy Drinks and Alcohol. AKA any kind of drinks that you and your bro's would drink.
Sentence: Bro i am really craving a BROTIEN right now.
by broman87 September 22, 2010