Idioms title

The Idiom Attic - a collection of hundreds of English idioms, each one explained.

The meaning of "loose cannon"

" Loose cannon "
Someone who is unpredictable and can cause damage by being reckless.
These negotiations with the Chinese are at a critical stage. Keep Jack out of it, he's just the sort of loose cannon that would say the wrong thing and upset them.
Where did it originate?:
Britain. 19th century.
Where is it used?:
Hear the idiom spoken:
More idioms about:   military  

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