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An inside term, meaning to rip someone off, or take advantage of someone's stupidity. Basically to toatally slap your fucking head, and jack prices up on you, so your busted broke and I'm sitting on all your cheddar...
I could see this Fudnoker coming from across the parking lot.

I Fudnoked the shit out of this old crackhead fucker today, i sold him a 8ball for $150, but he didn't know I cut half of it with that white battery acid corrosion powder that was all over my car battery. He-He, Fudnoked him good!
by ScinoBasher999 November 25, 2006
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