Similar words: blabber, flabbergast, flabbergasted, jabber, jabbering, jabberwocky, abbey, rabbet. Meaning: n. someone who gossips indiscreetly.
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1 That blabbermouth always gossips about other people's affairs.
2 I’m such a blabbermouth that I couldn’t keep the news from friends and coworkers.
3 The guy's a blabbermouth.
4 That blabbermouth that runs the cash register at the store?
5 EXAMPLE: My little sister is a blabbermouth who always ruins surprises by telling everyone what is going to happen, so no one in our family ever tells her about surprise parties.
6 If anyone has the top hat and wants to return it (no questions asked), please contact BLABBERMOUTH. NET.
7 But don't forget that no one pays attention to a blabbermouth .
8 Don't tell Dan, if you want to keep it a secret. The guy's a blabbermouth.
9 See if yu can keep your brother — who is a blabbermouth — to keep this still.