1 definition by Ruby Crystal Diamond

If you catch someone doing an action they are not supposed to be doing and you tell someone else to get them in trouble.

Telling on a person when they have done something they are not supposed to do.

To tell on someone.
A boy is about to take $10 from his mother's purse. His sister walks in and says, "If you take mom's money I'm going to blow you in!"
by Ruby Crystal Diamond July 21, 2011
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