yo-yak 

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.

yo-yak by Gary Grigg January 8, 2005

Yo-yakery

Engaging in yo-yak like behavior.

Yo-yak 1:I'm awesome.

Yo-yak 2:I'm cool.

Dude:What's up with all this yo-yakery?

Yo-yakery by Jangry!!! March 19, 2011

yoyak

another name for some clown who decides to do something very stupid or ignorant, and there are witnesses to his/her stupidity

Look at that yoyak, he just tryed to drive his 4by4 through a snow bank and hit a car.

yoyak by Gary January 14, 2005