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Paul pulled no punches as he unleashed a verbal tirade at McGregor and UFC president Dana White.
The YouTuber's profanity filled video turned personal when he insulted the UFC star's fiancée and brought up the fighter's past controversies.
Sign the contract @TheNotoriousMMA pic.twitter.com/xag5apMiQh
- Jake Paul (@jakepaul) December 14, 2020
"What the f**k is up, you Irish c**t?" He said, seated in a sports car and draped in an Irish flag while smoking a cigar.
"Good morning, Conor McGregor. I know you're probably beating up old dudes in a bar right now, or maybe you're jacking off because you're sick of f**king your wife.
"I mean, she's a four, Conor. You could do a lot better. But happy Monday.
"My team sent you a $50 million offer this morning - $50 million contract (with) proof of funds - the biggest offer you've ever been offered, but you're still scared to fight me, Conor."
The 2-0 boxer continued: "You're ducking me because you don't want to lose to a f**king YouTuber.
"You're 0-1 as a boxer. I'm 2-0 as a boxer.
"I just came off the eighth biggest pay-per-view event in history, but you want to fight Dustin 'Prober' who has less followers on Instagram than my f**king dog. That's a fact.
"Dana White, you're a f**king p**sy, too, you ugly, bald b**ch.
"You said there's zero percent chance of this fight happening, but there's zero percent chance of you getting some f**king p**sy. Conor, you're scared. Dana, you're scared.
"Sign the f**king contract, you idiots. Jesus f**king Christ. Irish b**ch. F**k these guys."
Paul's Instagram upload also contained a list of potential rules and another video of a conversation between him and Mike Tyson talking about McGregor.
Paul scored a spectacular one-punch KO victory over Nate Robinson on the undercard of Tyson's comeback as he eyes his next opponent.
As for 'The Notorious', he returns to action next month as he rematches Dustin Poirier at UFC 257.