curve bender
n.— «He had a pretty good start, weighing in an ounce shy of 9 pounds so you couldn’t call him a low-birth, high-growth “curve bender,” as they say in the cattle catalogs. He’s more of a high-birth, high-growth performance type.» —“Fathers, pride go together” by Ryan Taylor Capital Press (Salem, Oregon) May 4, 2007. (source: Double-Tongued Dictionary)