Mentally deranged; crazy.
1. To poison with locoweed.
2. Slang To cause to be mentally deranged; craze.
At the pitch written. Used chiefly as a direction.
[From Italian loco, from Latin locō, ablative of locus, place.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. slang chiefly US insane
2. (Veterinary Science) (of an animal) affected with loco disease
3. to poison with locoweed
4. slang US to make insane
[C19: via Mexican Spanish from Spanish: crazy]
(Commerce) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n., pl. -cos, n.
2. Slang. an insane person.
4. to poison with locoweed.
5. Slang. to cause to be insane.
6. Slang. out of one’s mind; insane; crazy.
[1835–45, Amer.; < Sp: crazy]
Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Past participle: locoed
Collins English Verb Tables © HarperCollins Publishers 2011
A Mexican Spanish word meaning crazy.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited