lo·co

[loh-koh] noun, plural lo·cos, verb, lo·coed, lo·co·ing, adjective
noun
2.
Slang. an insane person; maniac.
3.
Veterinary Pathology, locoism.
verb (used with object)
4.
to poison with locoweed.
5.
Slang. to cause to be insane or crazy.
00:10
Loco is one of our favorite verbs.
So is lollygag. Does it mean:
to spend time idly; loaf.
to expurgate (a written work) by removing or modifying passages considered vulgar or objectionable.
adjective
6.
Slang. out of one's mind; insane; crazy.

Origin:
1835–45, Americanism; < Spanish: insane

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To Loco
Collins
World English Dictionary
loco1 (ˈləʊkəʊ) [Click for IPA pronunciation guide]
 
n
informal short for locomotive

loco2 (ˈləʊkəʊ) [Click for IPA pronunciation guide]
 
adj
1.  slang chiefly (US) insane
2.  (of an animal) affected with loco disease
 
n , -cos
3.  short for locoweed
 
vb
4.  to poison with locoweed
5.  slang (US) to make insane
 
[C19: via Mexican Spanish from Spanish: crazy]

loco3 (ˈləʊkəʊ) [Click for IPA pronunciation guide]
 
adj
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
 
[C20: from Latin locō from a place]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

loco
1844, Amer.Eng., from Sp. loco (adj.) "insane," of uncertain origin, perhaps from Arabic lauqa, fem. of 'alwaq "fool, crazy person." Loco-weed (1879) was name given to species of western U.S. plants that cause cattle and horse diseases that make them stagger and act strangely.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Slang Dictionary

loco definition

[ˈloko]
  1. mod.
    crazy. (From Spanish.) : Who is that loco kid jumping up and down in the front seat?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
Cite This Source
Example sentences
And, a concerned parent who thinks the kids have gone loco has scuttled many a sale.
Object, such as a trailer, fouling right-of-way of loco-motive.
Slang
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT