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1 definition by Gary Grigg

 
1.
Noun..one who is an idiot or moron that thinks they are smart or cool and is very stubborn and will not acknowledge that they are..
That person is such a yo-yak for thinking he can drive his 4 by 4 into a 6 foot snow drift only to go into a ditch.
by Gary Grigg January 08, 2005