autograt

a tip that is included as a charge on a restaurant bill rather than left to a diner's discretion.

The Cooker: "those fuckers just took off without leaving the bartender a tip."
Pete Dick: "well, not really, they just think they did, I could see that based on their ethnicity that they were not going to leave her anything so I told her to put on an autograt."
Bartender: "you guys were right, I owe you a free pitcher."

by Pete Dick March 21, 2008