I hate affected, niminy-piminy chits!
Jo March - Little Women
One of the most underused adjectives I've come across. It is used once in Chapter 1 of the book Little Women (written by Louisa May Alcott), and also made it into the film starring Winona Ryder, Susan Sarandon and Claire Danes.

I have no clue as to its intended meaning other than in the context above. Used in the same sentence as affected, it also sounds synonymous with irritating, stupid and frivolous.