Top Definition
A person, specifically an Asian person, who is too boss at doing anything, especially math. Shy at first, but get to know him and he'll blow your brains out from his epicness.
Dude, did you hear about that Asion boy, Daniel? He won 1st place in some math contest. He's such a megabeast.
by Iloveblondieserryday March 26, 2012
1 more definition
To be ugly and man like when you are in fact female.
(Kirsty walks into room...)
"Oh look" said Person X
"Oh yes, it's the mega beast!" said Person Y
"Aghhhhhhhh" said I
by chandelear boogie wig July 03, 2006

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