Colloquial Variant guide

40 mike-mike

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

Any weapon firing a 40mm grenade. Often specifically the M203 grenade launcher, mounted underneath an M-16 or its variant. In the Marine Corps, often the Mark-19 Automatic 40mm Grenade Launcher.

Definition source: English Wiktionary via Wiktextract

Usage: slang

Qualifier: US Army and Marines

Topics: government, military, politics, war

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From Mike (“the letter M in the ICAO spelling alphabet”).