What it means
Someone who stomps into a delicate situation and ruins it with clumsy, loud, or tactless behaviour. They mean well sometimes, but they’re all elbows and opinions, breaking stuff that needed a softer touch. Works for literal awkwardness and for social blundering, like blurting secrets or picking fights at a calm dinner.
Usage examples
"We asked Dave to have a quiet word with the neighbours, and he marched in, slagged off their garden, like a bull in a china shop."
"He waded into the family argument like a bull in a china shop and managed to upset everyone within a minute."
"Careful unpacking the glasses, do not go at it like a bull in a china shop or we will have shards everywhere."
"I only asked him to smooth things over with HR, but he went in like a bull in a china shop and turned it into a full-blown row."
"Don’t send Kelly to break the news gently, she’s lovely but she can be like a bull in a china shop when nerves kick in."
Where it comes from
The image is old in English and goes back at least to the 1500s. A version appears in John Heywood’s 1546 proverb collection, long before modern china shops were the glossy little danger-zones we picture now. It lasted because the meaning lands fast: huge force, delicate setting, absolute carnage.