Quick answer
To blabber is to talk too much or let information spill out. A blabber is a person who cannot keep quiet.
Word page
Blabber is talk with a leaky lid. It often describes someone who says too much, gives away a secret, or keeps talking when silence would have been wiser.
To blabber is to talk too much or let information spill out. A blabber is a person who cannot keep quiet.
In plain English, blabber means to talk too much or reveal something you should have kept private. As a noun, a blabber is a loose-tongued person.
Blabber is not just talkativeness. It often carries the idea of indiscretion: the speaker says what should have stayed unsaid.
Blabber is related in sound and sense to blab and babble, expressive words for loose or excessive talk.
keep quiet, be discreet, stay silent, listen, keep a secret
Related forms include blab, blabbed, blabbering, and blabbermouth.
Use blabber when secrecy or careless oversharing matters. Use chatter for ordinary talk and babble for unclear speech.
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Edited by Absurd Words. Last updated: May 14, 2026. See the editorial policy for how definitions, examples, labels, and update checks are handled on the site.