Loose Cannon.
English
idiom
Someone who behaves unpredictably and can cause problems.
Trusted by1.5M+English learners & teachers worldwide
Someone who behaves unpredictably and can cause problems.
Trusted by1.5M+English learners & teachers worldwide
An unpredictable person who may cause problems with their uncontrolled behavior.
A loose cannon acts independently and impulsively in ways that create risk or embarrassment.
The term implies a lack of control that affects others.
"Wild Card"
—
Someone unpredictable whose outcome could be positive or negative
"Hothead"
—
Someone quick to anger, not necessarily unpredictable in all areas
"Loose Cannon"
—
An unpredictable person whose actions are risky and hard to control
He's a loose cannon — he approved that deal without running it by anyone.
I'll talk to him today. That cannot happen again.
Should I bring him to the dinner party?
He's a bit of a loose cannon — just make sure there's no drama.
What's your read on the new guy?
Talented, but a loose cannon. He needs some direction.
