Tony Ferguson claimed the UFC interim lightweight title with a victory over Kevin Lee at the T-Mobile Arena in Las Vegas on Saturday night.
El Cucuy finished Lee after four minutes of the third round at UFC 216 with a triangle choke.
After the fight, speaking to Joe Rogan in the Octagon, Ferguson called out champion Conor McGregor.
Where you at McNuggets? You fucking piece of shit! I'm going to kick your ass, you better come and defend that belt. Defend or vacate, motherfucker.
The Irishman has not fought in the UFC since winning the lightweight belt against Eddie Alvarez 11 months ago.
Here's the finish.