Daniel Cormier did the towel trick (pushing the towel down to lighten yourself on the scale) in order to make weight for his UFC Light Heavyweight title defense against Rumble Johnson at UFC 210, which sparked controversy.
UFC 210 Embedded: Vlog Series - Episode 6
Sea Level Cain is Cain Velasquez at his best - at sea level. Cain Velasquez is known for having great cardio, but when he fought in Mexico City, which is at very high altitude, he gassed out early and lost to Fabricio Werdum. People think it must have been the altitude, so Sea Level Cain is born.
A fighter who who is not very good, and puts up about as much fight as a tin can.
"His has seven wins, but they were all against cans. Tonight he will face his first real opponent."
Dana White commonly calls people "Goof" and so the nickname has stuck to him. He is now known as "The Goof".
Bangkok Ready means to be good at Muay Thai. Bangkok Thailand is the home of the martial art Muay Thai (Thai Kickboxing), and some of the best fighters in the world. To be "Bangkok Ready" is to be at such a high level of Muay Thai that you could go to Bangkok and compete with the best in the world. The phrase was made popular when Eddie Bravo told a story to Joe Rogan about an MMA fighter Gerald Strebendt who knew BJJ but then tried to master Muay Thai.
Eddie Bravo (on why he though Gerald Strebendt should try to use rappling instead of striking): "Because 6 months (of Muay Thai training)... I know he thinks he's Bangkok ready, but that's (only) 6 months (of training)."
"Bangkok Ready"
Originally popularized by UFC fighter Khabib Nurmagomedov, "Number One Bullshit" is something he would say to express dislike, disdain or disapproval for a person or situation.
Khabib Nurmagomedov (on Conor McGregor getting a lightweight title shot before he did): "This is number one bullshit."
Khabib Nurmagomedov This Is Number 1 Bullsh!t
Michael Bisping gave an interview in which they listed things he gives zero fucks about. One was Halloween, his response was along the lines of "Why would I care about halloween? Am I going to dress up as a sexy wizard? Zero fucks given" And now fans sometimes call him "Sexy Wizard Bisping".
Michael Bisping on a Sports Center Interview on whether he celebrates Halloween: "I'm a grown as man. I'm 37 years old. You think I'm dressing up as a Sexy Wizard or whatever the fuck it is?"