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1.
Can also be found next to the word 'gnarly' in the dictionary.

The act of a male ejaculating into a females face while she sleeps then throwing a handful of his recently shaven ass hair into her face and letting it dry.
Out of nowhere, Mike decided to give me Mountaineers Knuckles last night.

or

I gave her the messiest Mountaineers Knuckles, it was awesome.
by Fuckayooo1123 February 18, 2010