Butt in

verb, slang

Definitions

Verb
  1. 1
    To join a conversation or situation in which one is not welcome or invited; to interject (connotes a rude or discourteous interruption). idiomatic, informal

    "Hey, this is none of your business; don’t butt in!"

  2. 2
    break into a conversation wordnet
  3. 3
    To join a queue not at the end, but in the middle. transitive

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