rockroller Dictionary of American Regional English
rockroller n. 1 = caseworm n. West, chiefly UT Cf rock bait n, rock worm n 1. 1892 Heber Herald (UT) [20 June 3]/2, F[i]shing silversides or chubs is now taking up the greater part of the boys'' time, they take a thread line and pin hook, and bait with rock rollers or PaulBarnes Forest Groves 203 UT, Caddis Flies.—Have you ever turned over the flat rocks in the bed of ...