ack-ack

[ak-ak] /ˈækˌæk/

noun, Informal. (esp. during World War II)

antiaircraft fire.

antiaircraft arms.

Also, Ack-Ack.

Origin

1935-40; for A.A. (abbreviation of a(nti) a(ircraft)) as said by British signalmen referring to sense 2

Examples from the web for ack-ack

But we're shooting at them with rifles, and there's an ack-ack unit near there.
The ack-ack--German ack-ack was so heavy that the bombardier couldn't--couldn't make the--you know, his run.

British Dictionary definitions for ack-ack

/ˈækˌæk/

noun (military)

anti-aircraft arms

Word Origin

C20: British army World War I phonetic alphabet for AA, abbreviation of anti-aircraft

Word Origin and History for ack-ack

1939, representing A.A., the military abbreviation for anti-aircraft (see ack).

Slang definitions & phrases for ack-ack

modifier

: ack-ack positions

noun

Antiaircraft gun or guns; antiaircraft fire; aa, flak (WWI)