There are various antonyms for the phrase "return compliment," such as insult, rebuke, criticism, or belittlement. While a return compliment is a polite response to a compliment, these antonyms describe negative reactions to comments made about one's appearance, actions, or words. Insults can be intentional or unintentionally hurtful, while rebukes often involve correcting behavior. Criticism may involve pointing out flaws, while belittlement can be a form of bullying or undermining someone's self-confidence. It's important to be aware of these antonyms and the impact they can have on other people's feelings, and to strive for kindness and positivity in our interactions with others.