Definitions by Unsinkable Grace

omc 

"Oh My Cas"

Play on "Oh my God". Fans of the hit CW TV show, Supernatural, have come up with this term after the Season 6 Finale when a character (Castiel) proclaims himself as God.

Girl1: Did you see that Tumblr post?
Girl2: OMC, it was gorgeous.

omc by Unsinkable Grace November 20, 2011