Have a loose tongue American British Verb + object/complement
The verb "have" in the idiom "have a loose tongue" can be replaced by "get".
To talk freely, especially when unintentionally disclosing private information or secret to others
The manager warned all employees of having a loose tounge about the product to avoid leaking confidential information.
You have a loose tongue! You talk to all your classmates about my secrets.
Don't pay any attention to Jack. He always has a loose tongue.
To let a secret out by accident
To accidentally reveal what you are going to do or what you believe
1. To stop talking or thinking about something.
2. To unintentionally disclose important or confidential information.
To reveal, usually in an unintentional way
The verb "have" should be conjugated according to its tense.