Top Definition
The act of putting five or six dollars in a Tip Jar to influence customers to "tip"
Barista one: I put five singles in the tip jar so people will know where to put an extra dollar or two if we do a good job!
Barista two: "Spiking the tip jar" what a great idea!! we will make a lot more tips now!
by Crolojoe August 04, 2011

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