Reffering to Grover the bum. Giving trash to a sesame street character and having him turn it into something useful
Adam completely McGrubers his RC car.
by Scot Macumber April 4, 2008
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Noun - A person who talks a bunch of smack but in the end makes an ass-packer out of themself.
Person A.) Dude, I had hot sex with, like, fifty chicks last month.

Person B.) Like I give a fuck, Stuffs McGruber.
by Astro Jenkins December 7, 2010
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verb. To do something completely and totally legendary. We're talking legendary as in something that will be recorded in the annals of history.

noun. A legendary figure, possibly based on fact but entirely noteworthy.
Ronald Reagan was such a McGruber McWilliams.
by IsaacMJordan December 7, 2010
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