never tell tales out of school

never tell tales out of school

Do not share secrets or spread rumors with other people, as doing so will likely cause problems for someone else and will alienate you from them. Hey, I heard what you were saying at the bar the other night. Here's a tip: Never tell tales out of school about your co-workers, or you aren't likely to have any friends here before long.
See also: never, of, out, school, tales, tell
Farlex Dictionary of Idioms.

Never tell tales out of school.

Prov. Do not tell secrets; do not gossip. Fred: I just learned something really scandalous about the president of our company. Ellen: Well, I don't want to hear it. You shouldn't tell tales out of school.
See also: never, of, out, school, tales, tell
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • don't tell tales out of school
  • tell tales
  • tell tales out of school
  • tell tales out of school, to
  • lid on
  • lid on (something)
  • whisper (something) around
  • whisper around
  • unburden (oneself) to (someone)
  • unburden oneself to