Sometimes the best comeback is the one you think of in the shower and never say.
STILLNESS
STILLNESS
The satisfying line that arrives two hours late is doing something useful even unsaid. It proves you were not outmatched, you were just not interested in performing at speed, and that is a fine thing to be. Winning an exchange out loud and getting your evening back are usually different outcomes.
Let the perfect reply stay where it is. Say it to the mirror, laugh at it, and let that be the end of the transaction. If the thing actually needs addressing, do it tomorrow in plain words rather than clever ones.
Which sharp reply are you glad stayed in your head?
Free, with nothing to buy inside it.