backchat

From back +‎ chat.

• IPA^(key): /ˈbæk.tʃæt/

backchat (countable and uncountable, plural backchats)

1. (Britain) Cheeky or impertinent responses, especially to criticism.
   • 2004, Alan Hollinghurst, The Line of Beauty, Bloomsbury, 2005, Chapter 6,

     Old Pete would have had some smart gay backchat to deal with an awkward moment like this.

• backtalk (US)

backchat (third-person singular simple present backchats, present participle backchatting, simple past and past participle backchatted)

1. To respond in a disputative, often sarcastic manner.

   Peter was sent to detention for backchatting the teacher.

• (disputatively or sarcastically respond): mouth off, sass