Crowstiel

You're the bottom in this relationship. – Crowley to Castiel, 6.20 The Man Who Would Be King

Crowstiel is a portmanteau shipping name that refers to the slash pairing of characters Castiel and Crowley. Also known as Crowley/Castiel.

Crowstiel fanfiction often centers on or at least touches upon the partnership Castiel and Crowley had in Season 6, depicting that time as the start of a more intimate relationship between them.