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1 definition by Unsinkable Grace

"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.
by Unsinkable Grace November 15, 2011
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