Deputy Barney Fife
Couldn’t you just say “blabbermouth” ?
I heard this as “two horns” instead of “ass ears”. Each piece of grass whispered it to the other until everyone knew.
Crow and Servo.
JOEL: Can you guys keep a secret?
SERVO: Nope!
Crow: Never could, never will!
Since we’re dissolving into TV land.
Hurley
“You want to keep a secret, don’t tell the fat guy”.
I’m putting it in the vault. It’s in the vault!
Elaine, also of “Seinfeld,” was notorious for being unable to keep a secret. See, especially, the backwards episode (where they go to India for Sue Ellen’s wedding). Get her liquored up and she’ll reveal any secret.
Squire Trelawney couldn’t keep the destination of their expedition to Treasure Island a secret from anyone.
Marc
The Oracle of Delphi, natch. Her blabbermouthing is legendarily cryptic, but once you figure out what the hell she’s talking about, any secrets she has are told.