The Collaborative International Dictionary of English v.0.48:

Hyp \Hyp\, n.
   An abbreviation of hypochonaria; -- usually in plural.
   [Colloq.]
   [1913 Webster]

         Heaven send thou hast not got the hyps.  --Swift.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hyp \Hyp\, v. t.
   To make melancholy. [Colloq.] --W. Irving. Hypaethral