Top Definition
Someone who jumps to the front of the line at a fast food restaurant counter to get their drink refilled before the person they have cut has a chance to place an order.
"Dude, I was about to order a number 7 at Taco Bell, when this refill ninja totally cut in front of me. It happened so fast I didn't have time to react."
by Bad Obnauticus November 12, 2009

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