Examples:

• Don't tell Sarah anything confidential; she's a big mouth, and it'll be all over town by tomorrow.
• John's a big mouth; he can't keep a secret to save his life.
• I regret sharing that with you; you're such a big mouth.
• Her big mouth got her in trouble when she accidentally disclosed the surprise party plans.
• We can't trust him; he's known as the office big mouth.
• I should have known better than to confide in a big mouth like him.
• Keep this between us; I don't want it getting out to the big mouths in the neighborhood.
• It's challenging to have a private conversation when you're surrounded by big mouths.
• She's a nice person, but her big mouth can be a liability.
• Be careful what you say around Tom; he's a big mouth waiting to spill the beans.
• I can't believe I told my big mouth cousin about the surprise party; now it's no longer a surprise!
• The last thing we need is for the boss to find out. Watch out for big mouths in the office.
• His big mouth ruined the plot twist of the movie for everyone waiting in line.
• I'll share the news with you, but you have to promise you're not going to turn into a big mouth.
• The big mouth at the party blurted out personal details about her life.
• Jane regretted telling her secret to a big mouth friend who shared it with everyone.
• She had a reputation for being a big mouth, so we were cautious about what we told her.
• After the big mouth leaked the company's upcoming product launch, they had to change their strategy.
• Even though he's a big mouth, we couldn't exclude him from the group; he's part of the team.
• It's essential to be mindful of what you say around big mouths to protect your privacy and confidential information.