loco

adv

1. (not-comparable)A direction in written or printed music to be returning to the proper pitch after having played an octave higher or lower.

adj

1. (colloquial)Crazy.

   “It's Cottontail Smith, and he's gone plumb loco!”

   “Going loco down in Acapulco / If you stay too long / Yes, you'll be going loco down in Acapulco / The magic down there is so strong”

   “Who you trying to get crazy with ése? Don't you know I'm loco?”

   “Holla in New York, fo'sho they'll tell you I'm loco”

   “You know, I’m a little loco. Kinda crazy, zany guy.”

2. (Southwestern, US)Intoxicated by eating locoweed.

noun

1. (countable, uncountable)A certain species of Astragalus or Oxytropis, capable of causing locoism.
2. (abbreviation, alt-of, informal)Short for locomotive.

   “Small boys in 1963 could have traction engines with real steam coming out of the funnel, and Old Western locos had flashing lights, hooters and cow-pushers.”

3. (US, abbreviation, alt-of, historical, informal)Short for locofoco, in its various senses.

   “Like his fellow Young American locos, Thomas Dorr was an early and vigorous advocate of global republicanism and William Leggett’s locofocoism, though this point is little-known and less emphasized in histories of the Dorr Rebellion.”

verb

1. (transitive)To poison with the loco plant; to affect with locoism.
2. (broadly, colloquial, transitive)To render insane.

   “They say that he is locoed. The insane asylums of California contain many shepherds.”