loco

[ loh-koh ]

noun

, plural lo·cos.

1. locoweed.
2. Slang. an insane person; maniac.
3. Veterinary Pathology. locoism.

verb (used with object)

, lo·coed, lo·co·ing.

1. to poison with locoweed.
2. Slang. to cause to be insane or crazy.

adjective

1. Slang. out of one's mind; insane; crazy.

loco

¹

/ ˈləʊkəʊ /

noun

1. informal.
   short for locomotive

loco

²

/ ˈləʊkəʊ /

adjective

1. slang.
   insane
2. (of an animal) affected with loco disease

noun

1. short for locoweed

verb

1. to poison with locoweed
2. slang.
   to make insane

loco

³

/ ˈləʊkəʊ /

adjective

1. denoting a price for goods, esp goods to be exported, that are in a place specified or known, the buyer being responsible for all transport charges from that place

   a loco price

   loco Bristol

Word History and Origins

Origin of loco¹

1835–45, Americanism; < Spanish: insane

Word History and Origins

Origin of loco¹

C19: via Mexican Spanish from Spanish: crazy

Origin of loco²

C20: from Latin locō from a place

Example Sentences

On the return journey, a bolt sheared on what is now more widely known as the Penydarren loco, causing the boiler to leak.

From BBC

He was also asked about his understanding of the term "in loco parentis", namely having responsibilities for children in the absence of their parents or guardians.

From BBC

Guardianship letters convey authority and the right to make decisions concerning the child or children “in loco parentis,” which is Latin for “in place of the parents.”

From Encyclopedia.com

The chickens and birds he passed when riding his bike down Front Street to make loco moco and pancakes for patrons at the cafe where he worked.

From Salon

And if Hawaii’s loco moco could possibly be made more spectacularly comforting, this is that.

From Seattle Times