riposte -
An answer or reply, rapidly uttered, in response to a question or problem.
Verb
riposte -
To attempt to hit an opponent after parrying an attack.
riposte -
To respond quickly; particularly if the response is humorous.
Wikipedia
The riposte is an offensive action with the intent of hitting one's opponent, made by the fencer who has just parried an attack. In everyday language, a riposte is synonymous with a retort and describes a quick and witty reply to an argument or an insult.