A common acronym used to describe ones dismay or surprise to a situation or scenario meaning "Crap My Elbow". This phrase originally came from the acronym "O.M.G. W.T.F." but was created to the speaking styles of Louisiana, Mississippi, and Texas. "Crap My Elbow" is something that is impossible and therefore something to awe over.
Man 1-"Dude, I totally just wrecked into your car on accident!"
Man 2-"Goddamn it dude! C.M.E.!"