Top Definition
A real awesome dude who isn't afraid of anything and says "Yeah!" a lot.
Rob: Yo are you going to that concert?

Onesimo: Yeah!
by Exodus0077 November 01, 2012
smart mexican who has a stupid brother.
i know an onesimo.
do u like his brother.
no he was stupid and couldnt do 2+2.
by Daiske April 03, 2007

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