Jones it refers to rock wall climbing. When climbing the rockwall rather than using the set paths according to the difficulty levels the person jones it when they decide to use any hand and/or foot hold that they want.
Guy 1- Hey look the guy climbing that V1 Intro wall. He's not even using the right holds.

Guy 2- Yeah, he just jones'd it all the way to the top.

Guy 1- Does that count?

Guy 2- No, only little kids can get away with that.
by Capt' Awesome March 15, 2014

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