like a bull in a china shop
US /laɪk ə bʊl ɪn ə ˈtʃaɪnə ʃɑp/
UK /laɪk ə bʊl ɪn ə ˈtʃaɪnə ʃɑp/
1.
behaving in a very clumsy, awkward, or insensitive way in a delicate situation
:
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He handled the negotiations like a bull in a china shop, offending everyone involved.
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When she tried to help, she just barged in like a bull in a china shop and made things worse.