loco

American  

[loh-koh] / ˈloʊ koʊ /

noun

locos plural

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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Other Word Forms

Inflected Forms

noun

• locos
  plural

Etymology

Origin of loco

1835–45, < Spanish: insane

Explanation

If someone calls you loco, it means they think you're nutty or eccentric. Your friends will think your dog is completely loco if she spends hours every day chasing her own tail. You can use the slang term loco when you're commenting on the craziness or irrationality of a person or situation. You might say, for example: "This meeting is totally loco — everyone's talking at the same time!" Loco comes from American English, which borrowed it from the Spanish loco, "insane." Its roots are uncertain, but it may stem from the Arabic lauqa, "fool."

Example Sentences

The Costa Mesa-based chicken chain, which is traded under the symbol LOCO, has a $404.8-million market capitalization and an estimated $602.7-million enterprise value, according to Yahoo Finance.

From Los Angeles Times • Nov. 7, 2022

Domo is my conjecture for the transmitted LOCO, which is strange and difficult to construe.

From The Last Poems of Ovid by Akrigg, Mark Bear