Top definition
Verb; To bail on plans; To not follow through; to leave your friends hangin'; to be a bad friend; to impolitely cancel plans for no real reason.
"Hey, is Chris going to bring his halloween costume for you to borrow?"
"No, he's garthing out again."

"Dude, I'm so excited for our roadtrip this summer!"
"I think I might have to garth out, i don't really feel like it."
"Harsh, dude..."
by Xack November 02, 2009
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