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Welcome to English in a Minute.

A "cannon" used to be a common military weapon. But what could this expression mean?

Loose Cannon 冒失鬼

Anna: Jonathan, how did your virtual family reunion go?

Jonathan: Well... I've told you about my Uncle Bill, right?

Anna: Yeah, you said he's a bit of a loose cannon. Uh oh. What happened?

Jonathan: First, he insulted my mom's cooking. Then he started yelling about politics.

Anna: I totally understand. Every family has a loose cannon.

A "loose cannon" describes someone who can't be easily controlled. No one can really predict how a loose cannon will act or what they might say. Their actions can sometimes upset or even harm someone.

And that's English in a Minute!