What's the adjective for blab? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs blab and blabber which may be used as adjectives within certain contexts.
“A blabby Geico commercial came on the radio, and as Mr. Rowe made small marks with his pencil — skrit skrit skrit — he triggered a recording of, appropriately, Pablo Casals playing the Bach cello suites.”
“The early list of names included Slappy, Happy, Hoppy, Sleepy, Weepy, Dirty, Cranky, Sneezy, Hungry, Lazy, Grumpy, Dumpy, Bashful, Gabby, Blabby, Gloomy, Buzzy, Dizzy.”