a bull in a china shop

Từ điển Oxford Advanced Learner 8th

a bull in a ˈchina shop idiom
a person who is careless, or who moves or acts in a rough or awkward way, in a place or situation where skill and care are needed
•You're not going to go storming in there like a bull in a china shop, are you?
Main entry: ↑bull_idiom