1. similar to an upset, but from a inferior or unlikely person or group who upsetted a superior person or group

2. any sports-related upset or beating similar to the beating Appalachian State gave to Michigan

1. "I was about to make my move till that little brat App State'd me and got that girl's number!"

2. "The JV basketball team App State'd the Varsity team with ease!"
by Russell Franchise September 8, 2007
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