Welcome to English in a Minute from home.
A cannon used to be a common military weapon.
But what could this expression mean?
Jonathan, how did your virtual family reunion go?
Well, I've told you about my uncle Bill, right?
Yeah, you said he's a bit of a loose cannon.
Uh-oh, what happened?
First, he insulted my mom's cooking.
Then, he started yelling about politics.
I totally understand.
