jumper
n.— «This particular four-mile stretch of fencing was historically San Diego County’s most porous border problem, he said. His officers once had 1,250 apprehensions of during just one day’s shift, he said. And if a border patrol agent chased “jumpers,” as they’re called, in one direction, it would only allow other jumpers to sneak through the previously guarded site.» —“Indiana Guard unit begins mission on the border” by Jerry Davich in Tacate, Mexico Post-Tribune (Gary, Indiana) Mar. 25, 2007. (source: Double-Tongued Dictionary)