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1.
A really ripped guy that works out on the bowflex to the point of mastering it. His diet consists of cheeseburgers.

He has huge biceps, a niiiiiiice chest and a rock-hard six-pack.
Man 1: Holy shit! How is that guy so muscular?!
Man 2: I heard he uses the Bowflex PowerPro.
Man 1: Damn I gotta get me one of those!"
by Weeeeeee! June 26, 2005
 
2.
Anyone that has maxed out the capacity of the Bowflex. They have used it to the point of mastering it, earning the title BowflexMaster. The diet of BowflexMasters usually consist of cheeseburgers and hotdogs.
"That guy is really muscular!"
"Thats because he's a BowflexMaster"
by The Weeeeeee Musketeer July 05, 2005