half cock

¹ American  

[haf kok] / ˈhæf ˈkɒk /

noun

1. the position of the hammer of a firearm when held halfway to the fully retracted position by a mechanism that prevents it from being released and firing the gun when the trigger is pulled.

---

half-cock ² American  

[haf-kok, hahf-] / ˈhæfˈkɒk, ˈhɑf- /

verb (used with object)

1. to set the hammer of (a firearm) at half cock.

---

half-cock British  

noun

1. on a single-action firearm, a halfway position in which the hammer can be set for safety; in this position the trigger is cocked by the hammer which cannot reach the primer to fire the weapon

2. 1. to fail as a result of inadequate preparation or premature starting

   2. to act or function prematurely

---

Etymology

Origin of half cock¹

First recorded in 1695–1705

Origin of half-cock¹

First recorded in 1825–35