The remaining beer left at the end of a good nights drinking. So named, since it is in fact an anti-trophy. The owner of the trophy should not be proud of it.
This can occur when a waitress miscounts the bar tab, and the person who is charged one less beer orders two during the final round to make up for it.
Matt: Looks like Gregg is going for another trophy tonight.
Mike: Good thing there is a ledge behind our table.
Gregg: Shut up!