Definition of loose cannon in English:

loose cannon

Syllabification: loose can·non

noun

An unpredictable or uncontrolled person who is likely to cause unintentional damage.
More example sentences
  • The establishment feared him as passionate and unpredictable - a loose cannon.
  • She'd changed quite a bit since the days of her being classified as a loose cannon and an unpredictable quality on the field.
  • Then there is the loose cannon of the Juventus side, the unpredictable genius who gives them an ability to score from nothing, a player capable of becoming the best in the world, if only he can curb his dark side.

Definition of loose cannon in:

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Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily