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A preposterous amount of testosterone. Something incredibly Manly or Hard
Example 1:
"Did you just see those two guys jousting on trail bikes? It's totally Testosterous"

Example 2:
Guy 1: "Wow, that dude just towed a 747 with his teeth, that's one of the most testosterous thing I've ever seen."
by Timmy_222 November 13, 2009
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