tell tales out of school

tell tales

To share secrets, often knowing that doing so will cause problems for someone else. Here's a tip: don't tell tales about your co-workers if you want to have any friends here.
See also: tales, tell

tell tales out of school

to tell secrets or spread rumors. I wish that John would keep quiet. He's telling tales out of school again. If you tell tales out of school a lot, people won't know when to believe you.
See also: of, out, school, tales, tell
References in periodicals archive ?
This is called "motivational" though some of us might consider encouragement to grass up mates and tell tales out of school closer to moral corruption.