the.com/repartee

means A quick, clever reply that trades wit back and forth in conversation, usually faster than you had any right to think of it.

from From French repartie, 'a quick retort,' from repartir meaning 'to set out again' or 'reply promptly' — itself from re- ('again') plus partir ('to depart, divide'). The sense shifted from literally departing again to volleying a remark straight back, like a ball returned in play.