back-chat

/B AE1 K CH AE0 T/
noun
  1. 1

    Cheeky or impertinent responses, especially to criticism.

Synonyms

verb
  1. 1

    To respond in a disputative, often sarcastic manner.

    โ€œPeter was sent to detention for backchatting the teacher.โ€

Source: https://en.wiktionary.org/wiki/back-chat, https://en.wiktionary.org/wiki/backchat