Top Definition
When you cheap out at McDonald's and order a water with your double cheese burger and the cashier hands you a soda cup instead of the standard 6oz water cup.
Ken: Sweet I got the go ahead cup, now I can wash down the grease from the cheese burger with some coke.

Jeff: yo Ken, you are Ghetto Rich.
by DB in MO August 24, 2008
5 Words related to Go ahead cup

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