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1.
Adjective meaning the best, master, godly, no substitute etc...
See Kryzto, SEQ, Slusher
Jeanelle: Who is Slusher anyway?
Kryzto: Slusher is Prostyle.

Kryzto: I just pwnd some noob who chose mids in cutthroat.
Slusher: Prostyle
by Tim Slusher April 27, 2006
 
2.
To be good at something, like a pro, while still being an amatuer.
Originates from "Tony Hawk's Pro Skater"
1. Nice one man that was pro style
2. He is pro style at the drums
by tuce March 10, 2004