More on Marry Come Up from Infoplease:

• Marry Come Up! - Marry Come Up! An exclamation of disapproval, about equal to “Draw it mild!” May Mary ...
• Come Up - Come Up Marry, come up! (See Marry.) “To come up to” means to equal, to obtain the same ...
• William Shakespeare: Romeo and Juliet, Act II, Scene V - The clock struck nine when I did send the nurse; In half an hour she promised to return. Perchance she cannot meet him: that's not so. O, she is lame!
• William Shakespeare: Pericles, Act IV, Scene VI - Well, I had rather than twice the worth of her she had ne'er come here.
• Dictionary of Phrase and Fable: M - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "M"