Definition from Wiktionary, the free dictionary
- Excessively competitive.
2007 April 12, Mike Albo, “Because a Logo Is Not Enough”, New York Times:
- Regardless, the store provided a moment of healing for my PECS. JackRabbit’s message is what our P.E. teachers should have told us from the very beginning: being athletic doesn’t mean you have to be an overcompetitive jerk.