The point during the orbit of a celestial body at which it is nearest its star. Typically this term is used only for planets, moons, and other similar bodies.
The Perihellion either Fucking somebody whilst Water Boarding them, or being Fucked whilst being Water Boarded, if you don't know what Water Boarding is because you're not a Terrorist, or Fucking is because you're an Incel, or what an Incel is , I'm sure this site will have great Definitions for them both!
The Perihellion: Dude i got smashed on speed last night and completely Perihellioned this bitch all night! Then I thought fuck it, I let her Perihellion me! and I fucking loved it!