The Collaborative International Dictionary of English v.0.48:

Slouch \Slouch\, n. [Cf. Icel. sl?kra slouching felloew, and E.
   slack, slug, a lazy fellow.]
   1. A hanging down of the head; a drooping attitude; a limp
      appearance; an ungainly, clownish gait; a sidewise
      depression or hanging down, as of a hat brim.
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   2. An awkward, heavy, clownish fellow. [Colloq.]
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   Slouth hat, a soft, limp hat of unstiffened cloth or felt.
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