Top Definition
To blow someone off hard core and without a reason. To stand someone up.
"Shane is really lame. We had plans to go to the club on Saturday and the bastard thoroughly gnarl shined me. Didn't even call. Fucker."

"I'm sick of Chris' bullshit attitude. I'm going to gnarl shine him for surfing today."
by HankB June 15, 2009
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