backchat /ˈbæk.t͡ʃæt/noun 1verb 1forms 3 noun1 •(UK) Cheeky or impertinent responses, especially to criticism.Old Pete would have had some smart gay backchat to deal with an awkward moment like this. — 2004 verb1 •To respond in a disputative, often sarcastic manner.Peter was sent to detention for backchatting the teacher. formsbackchatted · backchatting · backchats