CROCK

n. & v. colloq. --n. 1 an inefficient, broken-down, or worn-out person. 2 a worn-out vehicle, ship, etc. --v. 1 intr. (foll. by up) break down, collapse. 2 tr. (often foll. by up) disable, cause to collapse. [orig. Sc., perh. f. Flem.]