shack n. a direct hit on a target by a bomb or missile. Etymological Note: Perhaps from the actual shacks—‘rude cabins or huts’—used in live-fire target practice. (source: Double-Tongued Dictionary)
shack
n.— «Schmidt: “Shack.” [jargon for direct hit].» —“Doubts Before Bombing” by Dave Goldiner N.Y. Daily News Jan. 16, 2003. (source: Double-Tongued Dictionary)
shack n.— «Twenty-two seconds after dropping his bomb, Schmidt gave the universal striker-pilot signal for a direct hit: “Shack.”» —“A Soldier’s Story: Part Two” by Ron Corbett Ottawa Citizen (Can...
shack n.— «The operative on the ground radioed confirmation: “That’s a shack,” slang for a direct hit.» —“Over Afghanistan, Gantlets in the Sky” by Steve Vogel in Aboard The USS Carl Vinson Washington...