Even if the MMA fighter you’re talking to has retired from competition like Josh Neer, don’t talk shit to them. And definitely don’t challenge them to a fight over and over and over until they feel like they have to fight you just to get you to shut up!
And then, after the guy you were talking shit to completely obliterates you to the point that other people feel they have to intervene, don’t come back talking more shit. The ability to talk shit is not impressive even if you can back it up. If you can’t even back it up, there’s absolutely no reason you should be talking shit.
Massive douche tip: If your only skill is talking shit, you’re probably a massive douche.