blabbermouth

[blab-er-mouth]

noun

plural

blabbermouths 

1. a person who talks too much, especially indiscreetly.

   Synonyms: tattler, bigmouth, talebearer, busybody, gossipmonger, gossip

blabbermouth

/ ˈblæbəˌmaʊθ /

noun

1. informal,  a person who talks too much or indiscreetly

Word History and Origins

Origin of blabbermouth¹

An Americanism dating back to 1935–40; blabber ( def. ) + mouth

Example Sentences

These guys were used to blabbermouths as bosses.

From Los Angeles Times

They were nice, these two witches, and Seven hoped they’d also be blabbermouths.

From Literature

“And not a word about this to the others, you blabbermouth.”

From Literature

If Instagram chooses to limit my account forever, so be it — I’ll just take my live act to Pershing Square on Saturday mornings like so many blabbermouths before me.

From Los Angeles Times

"Trump is an extreme blabbermouth," Dr. Richard D. Wolff, the professor emeritus of economics at the University of Massachusetts Amherst, told Salon.

From Salon