half-cock noun > go off at half-cock generally, to start without being ready; in sex, to ejaculate prematurely or without being fully erect. A variation of HALF-COCKED UK, 1904
half-cock adjective ill-considered; inferior UK, 2002. > at half-cock not fully prepared or ready UK, 2000
half-cocked adjective 1 not fully capable; not completely thought out; unfinished; incomplete. Derives from the mechanism of a gun US, 1833. 2 drunk AUSTRALIA, early C19. > go off half-cocked generally, to start without being fully erect. Gun imageny UK, 1809