Similar to a Hot Carl but a Hot Carlson is when you piss on the face and then defecate on it.
Blaine: Dude, I can't believe you fucked Charity.
Nick: If you think that is bad than did you know Greener gave her a Hot Carlson?
Blaine: Dude, did you still kiss her?
Nick: Ya toungue and all. I love that shit.