loco

American  

[loh-koh] / ˈloʊ koʊ /

noun

plural

locos

1. locoweed.

2. Slang. an insane person; maniac.

3. Veterinary Pathology. locoism.

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verb (used with object)

locoed, locoing

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 British  

/ ˈləʊkəʊ /

adjective

1. slang insane

2. (of an animal) affected with loco disease

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noun

1. short for locoweed

verb

1. to poison with locoweed

2. slang to make insane

loco ² British  

/ ˈləʊkəʊ /

noun

1. informal short for locomotive

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loco ³ British  

/ 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

   loco Bristol

   a loco price

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Etymology

Origin of loco

1835–45, < Spanish: insane

Example Sentences

Coaches often serve in loco parentis, guiding a developing prospect not only through training and tournaments but also the awkward riddles of growing up.

From The Wall Street Journal

"The loco pilot, on observing the herd of elephants, applied emergency brakes. However, elephants dashed with the train," he said.

From Barron's

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