tattle - definition and synonyms

verb [intransitive] mainly American showing disapproval 

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/ˈtæt(ə)l/
present tense
I/you/we/theytattle
he/she/ittattles
present participletattling
past tensetattled
past participletattled
  1. to tell someone that another person has done something bad, usually in order to get them into trouble. This word is used mainly by children or when speaking to children.