Origin of blab
Middle English blabbe; akin to Middle English blaberen
First Known Use: 14th century
Simple Definition of blab
: to say something that was supposed to be kept secret
: to talk too much
Full Definition of blab
1 : to talk idly or thoughtlessly
2 : to reveal a secret especially by indiscreet chatter
: to reveal especially without reserve or discretion <blabbed the whole affair to the press>
Examples of blab
Don't tell Mary. She'll blab it all over town.
“How did she find out about the surprise party?” “Tom blabbed.”
He kept blabbing on and on about politics.
First Known Use of blab
Seen and Heard
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