the GNU version of the Collaborative International Dictionary of English
n. a racehorse that exhibits a better than usual performance when the racetrack is wet or muddy.
n. An athlete who performs better than his/her average under muddy conditions.
The Century Dictionary and Cyclopedia
n. A horse which runs best on a muddy track; a mud-runner.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a racehorse that runs well on a muddy racetrack
Word Usage
"BTW- my "mudder" says the reason I got so much attention was not a result of my comity, but rather that I was a "rotten,rotten" little kid who she needed to strap down lest I reek havoc."