Top Definition
Cuboyd is a Youtube personality who is a superhero with a box costume who goes around, disproving bets and doing (failing) stunts. He's pretty awesome, and gets offended when called a mong.

Don't be a square, be a cube!
Did you see the new Cuboyd video? It's awesome!
#cuboyd #cube #mong #cowpie #yellow #leggings
by eatmysocks100 June 09, 2013
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