Answer:

BLAB

Answer	Crossword Clue
BLAB	Act the gossipmonger
BLAB	Tattle
BLAB	Spill the beans

BLAB	Spill a secret
BLAB	Gossip
BLAB	Talk a blue streak
BLAB	Let the cat out of the bag
BLAB	State secrets?
BLAB	Expel hot air
BLAB	Not shut up
BLAB	Talk too much

BLAB	Snitch
BLAB	Tell tales out of school
BLAB	Throw discretion out the window, in a way
BLAB	Tell
BLAB	Tell almost anyone
BLAB	Tell all
BLAB	Play the stoolie
BLAB	Ruin the secret

BLAB	Tell just about anybody
BLAB	Tell everyone
BLAB	Ruin the surprise
BLAB	Run off at the mouth
BLAB	Betray a confidence, perhaps
BLAB	Yak
BLAB	Divulge
BLAB	Give away

BLAB	Sing, so to speak
BLAB	Prattle
BLAB	Speak without restraint
BLAB	Spill secrets
BLAB	Squeal
BLAB	Go on and on and on ...
BLAB	State secrets
BLAB	Give away a secret

BLAB	Fail to keep a secret
BLAB	Reveal
BLAB	More than talk
BLAB	Chatter thoughtlessly
BLAB	Prove untrustworthy, in a way