Top Definition
To be the master of masters, or become the best you can be at something.
Dang, his dance moves are so masterous.
by Halios October 25, 2010
1 more definition
like fucking monster , beast , the superior mother fucker , could also refer to looking fresh
"that guy is dress masterous today"
"i am mighty masterous compared to the 13th graders
by masterous giver October 15, 2008

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