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ack ack

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ack-ack

[ak-ak]
–noun Informal. (esp. during World War II).
1. antiaircraft fire.
2. antiaircraft arms.
Also, Ack-Ack.


Origin:
1935–40; for A.A. (abbrev. of a(nti) a(ircraft)) as said by British signalmen referring to sense 2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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