What is the idiom...

[Redyellowpink]

What is the idiom for when someone is unnessecarily argumentative or antagonistic basically always wanting to start a fight. It's something like 'they always bring a crossbow to a party' but crossbow and party are the wrong nouns...??

There's "don't bring a knife to a gun fight" but that means be adequately prepared.

Sorry.

Bull in a china shop?

I don't know, but I like the expression "They could start a fight in an empty room"

Hmmm, I'm starting to think I imagined it. These are all good but not right.