For situations when a fighter is losing very badly and appear to be taking damage with no chance of winning, and yet the referee does not stop the fight, the ref is assumed to be thinking "If he dies, he dies". Originally referring to referees Mario Yamasaki and Steve Mazzagati who are notorious for letting one-sided beatings go on too long.
3 Minutes of Mario Yamasaki Forgetting That He's The Guy Who's Supposed to Stop the Fight
3 Minutes of Steve Mazzagatti's Most Bonehead Calls
After Derrick Lewis knocked out Alexander Volkov, he took off his shorts inside the octagon, leaving only his underwear. Joe Rogan asked him why he did that and Lewis answered "My balls was hot."
Joe Rogan: "I'm here with the winner Derrick Lewis. Derrick, why did you take your pants off?" Derrick Lewis: "My Balls Was Hot." Joe Rogan: "I understand."
UFC 229: Derrick Lewis Octagon Interview
To fight at a faster pace than your opponent can maintain, tiring them out. Nick Diaz is a fighter known to weaponize pace. His training involved lots of cardio, so he was able to have higher output than his opponents during fights, often successfully tiring them out and overcoming them.
"Poirier has never been given credit for his ability to weaponize pace. Dustin's former opponents will talk about how hard and in your face Poirier is." - Chael Sonnen
Jorge Masvidal answering a reporter's question about his two follow up punches after brutally ko’ing Ben Askren with a jumping knee. The punches were landed after the opponent was clearly knocked unconscious, much reminiscent of the flying bomb Dan Henderson landed on a stiffened Michael Bisping .
Jorge Masvidal explains why his punches to Ben Askren were 'very necessary'
Anderson Silva, a Brazillian who speaks English as a second language, says "Is Normal" a lot where an English speaker might say "Fine". For example, when asked how he feels during fight week, he responds "is normal."
Reporter: "How do you feel about (fighting) Chris Weidman? Did you maybe underestimate him the first time?" Anderson Silva: "Is normal. Is normal. Come on guys... Is normal. He don't have nothing. Normal. He got two legs, two arms...normal!"
UFC Anderson Silva "It's Normal"
After losing to Matt Hughes, George St-Pierre stated he was not impressed and wanted a rematch. However, he did it in the most polite way which is typical of GSP.
Joe Rogan: "Here's Georges." Georges St-Pierre: "I'm very glad you won that fight, Matt, but I'm not impressed by your performance and I look forward to fighting you in the near future."
GSP is not impressed
Chael Sonnen, a former UFC and Bellator fighter, once described his body as "Basically Clean" of performance enhancing substances. He went on to say "it depends on your definition of clean". Since retiring, Sonnen has since admitted to using PEDs while competing as an MMA fighter.
"Ariel, look at the size of that arm! (points to his own bicep.) That's Clean! That's off the juice! That's basically clean. It depends on your definition of clean." - Chael Sonnen in conversation with Ariel Helwani.