hagaloff
Hagaloff is when two people argue like they're trying to out-swear each other. They don't care about the deal. They just want to make the other person look like a fool.
'I'll take it for ten bucks. You're just mad I beat you at hagaloff.'
'You're not even worth the trouble. I could haggle a donkey into silence.'
'You think you're smart? I could sell this to your grandma for half the price.'