look up any word, like trill:
 
1.
The shorter and more commonly used version of the term "Pro Extreme Beast". Which means "What you say when describing something or someone that is amazing. It is usually shortened to just Pro Ex Beast."
"Wow that guy is Pro Ex Beast at Call of Duty." or "That kill cam was so Pro Ex Beast!!!"
by PRO xASSASSINx April 16, 2013