Swordplay is the act of engaging in a duel-like conversation where you try to outsmart your opponent with witty remarks and counter-moves, while your opponent tries the same. This is often during an argument or involuntary.
"Your arguments are those of an dairyfarmer!"
"How appropriate, you blabber like a cow!"
"Ooooo, fiine swordplay there, my friend."
Person 1: Woah, Count got a new record in Swordplay Duel!
Person 2: Isn’t that the sport where you just have a seizure with the Wii Remote?
Person 1: No, that’s Tennis.