Mountains, Fat and Lean

Madison County maps read like menus. In looking at a 1938 highway map I spotted towns named Grapevine and Walnut, mountains named Sugar Loaf, Huckleberry, and Potato Gap, and a feature with the rather abrupt name of Lick Rock. But it’s these two mountains, at opposite ends of the county and with seemingly contradictory names, that really distinguish the place:


The North Carolina Gazetteer doesn’t list an origin for either name. I think we can guess where “Big Butt” came from, but what could be the origin of “Nofat”? Was there an early movement of strict mountain dieters who have been otherwise lost to history? Or is it just a particularly skinny peak?