locoing

from The Collaborative International Dictionary of English v.0.48

Loco \Lo"co\, v. t. [imp. & p. p. {Locoed}; p. pr. & vb. n.
   {Locoing}.]
   To poison with loco; to affect with the loco disease; hence
   (Colloq.), to render insane or mad. "The locoed novelist."
   --W. D. Howells.
   [Webster 1913 Suppl.]