From a discussion on BeatGear Cavern:
Thu Aug 20, 2009 12:05 pm
Alright, I give -- what's "gar-mouthed"?
It's a red-neck phrase for someone who is all mouth. The gar that inhabit the Missouri River have evolved and in-bred to the point that a fish that is 18 inches long will have a mouth that is at least half that long. Very ugly critters.