Meanderthal

The condition demonstrated by one having one's head down, focused solely one one's cell phone screen while walking, invariably at a slow, dazed pace on a random, haphazard course. Often accompanied by mouth breathing. The condition is non-gender specific.

Terry's meanderthal wanderings have been responsible for multiple cases of other pedestrians having to suddenly change course to avoid collisions, and more than one or two rear-end collisions as Terry aimlessly stepped into traffic without warning, oblivious to the rest of the world.