Top Definition
one who never backs down and is always ready for a brawl.


a situation that is hard to break...hard to tangle your way out of
We got a McGuilla on our hands...when Stinson slueced that work of art--a fat grungula saw him and told the cops...McGuillacutty!

That McGuillacutty will take on all of those fools!
by Dave Schechtman & Jared Smits March 16, 2009
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