What do we call a quick, witty reply in conversation?

The term "repartee" refers specifically to a quick, witty reply or a series of such replies in a conversation. It emphasizes the cleverness and speed of the response, showcasing someone's ability to engage in a lively and humorous exchange. This word is often associated with social interactions where banter and sharp wit are appreciated and contribute to the overall dynamic of the conversation.

While terms like "rejoinder," "retort," and "riposte" share similarities, they can have distinct connotations. A rejoinder is typically a response or reply but may not necessarily carry the same connotation of wit or humor as repartee. A retort often implies a sharp comeback, but it may focus more on an argumentative tone rather than a playful conversation. A riposte generally refers to a quick and clever reply, often in a debate or conflict context, which might lack the broader social aspect inherent to repartee. Therefore, "repartee" is the most fitting choice for describing a quick, witty reply in a conversational setting.