When someone dances so atrociously that it looks like they're having a seizure. This references Jojo Siwa, who dances like she put hot sauce on her vagina.
Dude, stop, you're embarrassing me. Your doing the Siwa Seize.
When a man's pubic hair is so unkempt that it completely engulfs the shaft.
This references the Pokémon "Blaziken", who famously always looks like he has a bush covering his dong.
I had a bad Grindr hookup last night. The motherfucker had a Blaziken Bush. I felt like I was flossing when I was going down on him.