eristic
One who makes specious arguments; one who is disputatious.
A type of dialogue or argument where the participants do not have any reasonable goal. The aim is to argue for the sake of conflict, and often to see who can yell the loudest.
Poets may be incurious of the subtleties of philological eristic, but they are wont to see into the heart of things.
Where it comes from
Borrowed from Ancient Greek ἐριστικός (eristikós, “eager for strife”). See also Eris.
Adapted from the Wiktionary entry eristic (CC BY-SA 4.0).