Definition of "megrims"

megrims

noun
plural only
1. Chiefly preceded by the: depression, low spirits, unhappiness.
  Quotations
  Thou art properly my cephalick ſnuff, and art no bad medicine againſt megrims, vertigoes, and profound thinking—ha, ha, ha.
  1766, George Colman, David Garrick, The Clandestine Marriage, a Comedy. […], London: […] T. Becket and P. A. De Hondt, […]; R[oberts] Baldwin, […]; R. Davis, […]; and T[homas] Davies, […], Act IV, scene ii, page 58
  I'm not myself, of course, an idealistic girl in love with a member of the staff of the Thursday Review and never have been, but if I were I know I'd get the megrims somewhat severely if I caught [my fiancé] in a clinch with anyone as personable as this stepdaughter of Aubrey Upjohn, for though shaky on the IQ, physically she was a pipterino of the first water.
  1960, P[elham] G[renville] Wodehouse, chapter XIII, in Jeeves in the Offing, London: Herbert Jenkins
2. (veterinary medicine) Any of various diseases of animals, especially horses, marked by a disturbance of equilibrium and abnormal gait and behaviour such as staggers or a sudden vertigo, sometimes followed by unconsciousness; the staggers.
noun
1. plural of megrim