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Predominately used to refer to 4x4 ATVs but may refer to any motorized off road vehicle (i.e., snowmobile, sand rail) which allows non-athletic couch potatoes to get into backcountry places they typically would never consider getting to through their own physical exertion and exercise. Likelihood of driver being from Texas is disproportionately high. They are particularly found in the mountains and deserts of Colorado, Utah, Oregon, and California.

The term is often used by real outdoorsy people as a sign of irritation and disgust. See below examples.
Did you see what those assholes in the Texas Wheelchairs did to our favorite hiking trail? Why don't they just get off their fat lazy asses and walk or bike up here?
by furiousness June 13, 2011
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