\Wish"y-wash`y\, a. [See {Wash}.]
Thin and pale; weak; without strength or substance; --
originally said of liquids. Fig., weak-minded; spiritless.

      A weak wishy-washy man who had hardly any mind of his
      own.                                     --A. Trollope.

\Wish"y-wash`y\, n.
A weak or thin drink or liquor; wish-wash.