The couple name given to Grey's Anatomy characters Meredith Grey and Derek Shepherd. It's only used outside of the show, when fans are talking about them.
Did you see last night's episode of Grey's? You see that McDreamy moment? I love merder!
by Maybelle29 July 03, 2009
a type of insane muderer who kills with a meathook or a wooden pole
john is a merderic and will be sent to a insane new home
by kingofsin666 March 26, 2007