Bull in a China Shop

Idiom: Bull in a china shop

Example 1:

Martha: Are you going to Jesse's party?

Luke: No

Martha: Why?

Luke: Her living room, with its delicate furniture and knickknacks, makes me feel like a bull in a china shop

Martha: I know exactly what you mean. I can be very clumsy too

Example 2:

Keiko: I don't think you care about me

Ryu: Why do you say that?

Keiko: When we fight you become really aggressive and don't care about my feelings. I'm sensitive, and you are like a bull in a china shop.

Meaning: to be extremely clumsy; aggressive, without care or control.

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