Top Definition
To masterbeast is:

1) To play alone in a multiplayer game by yourself because your friends don't want to play with you.


2) To be a badass when the rest of your team is down and out.
1) Yesterday I was masterbeasting because you guys didn't want to play with me.

2) Damn all you fools suck, I had to masterbeast for us to get through the last round.
by THE ON3 November 01, 2011
something that leaves the beholder with a feeling of awe. it may be something considered to be amazing or unbelievable. something that is uncommonly witnessed.
i sae someone eat their own head was totally masterbeast.
by beast master clive December 07, 2010
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