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Definition of Mike-Mike in English:

Mike-Mike

(also mike-mike)

noun

US
military slang

  • Especially in the war in Vietnam: a weapon, or ammunition, the calibre of which is measured in millimetres; a millimetre (chiefly attributive).

Origin

1960s; earliest use found in Esquire Magazine. From Mike + Mike, after mm.

Pronunciation

Mike-Mike

/ˌmʌɪkˈmʌɪk/