loco

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lo·co¹

(lō′kō)

adj.Slang

Mentally deranged; crazy.

n.pl.lo·cos

1. See locoweed.

2. See locoism.

tr.v.lo·coed,lo·co·ing,lo·cos

1. To poison with locoweed.

2.Slang To cause to be mentally deranged; craze.

[Spanish,crazy, possibly from Arabiclawqā',foolish, feminine sing. of'alwaq, fromlāqa,to soften; seelwq inSemitic roots.]

lo·co²

(lō′kō)

adv. & adj.Music

At the pitch written. Used chiefly as a direction.

[From Italianloco, from Latinlocō, ablative oflocus,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.

loco

(ˈləʊkəʊ)

informal short forlocomotive

loco

(ˈləʊkəʊ)

adj

1.slangchieflyUS insane

2. (Veterinary Science) (of an animal) affected with loco disease

n,pl-cos

(Plants) short forlocoweed

vb (tr)

3.to poison with locoweed

4.slangUS to make insane

[C19: via Mexican Spanish from Spanish: crazy]

loco

(ˈləʊkəʊ)

adj

(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 Latinlocō from a place]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

lo•co

(ˈloʊ koʊ)

n.,pl.-cos,n.

1.locoweed.

2.Slang. an insane person.

3.locoism.

v.t.

4. to poison with locoweed.

5.Slang. to cause to be insane.

adj.

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

[1835–45,Amer.; < Sp: crazy]

loco

Past participle:locoed
Gerund:locoing

Imperative
loco
loco

Present
I loco
you loco
he/she/it locos
we loco
you loco
they loco

Preterite
I locoed
you locoed
he/she/it locoed
we locoed
you locoed
they locoed

Present Continuous
I am locoing
you are locoing
he/she/it is locoing
we are locoing
you are locoing
they are locoing

Present Perfect
I have locoed
you have locoed
he/she/it has locoed
we have locoed
you have locoed
they have locoed

Past Continuous
I was locoing
you were locoing
he/she/it was locoing
we were locoing
you were locoing
they were locoing

Past Perfect
I had locoed
you had locoed
he/she/it had locoed
we had locoed
you had locoed
they had locoed

Future
I will loco
you will loco
he/she/it will loco
we will loco
you will loco
they will loco

Future Perfect
I will have locoed
you will have locoed
he/she/it will have locoed
we will have locoed
you will have locoed
they will have locoed

Future Continuous
I will be locoing
you will be locoing
he/she/it will be locoing
we will be locoing
you will be locoing
they will be locoing

Present Perfect Continuous
I have been locoing
you have been locoing
he/she/it has been locoing
we have been locoing
you have been locoing
they have been locoing

Future Perfect Continuous
I will have been locoing
you will have been locoing
he/she/it will have been locoing
we will have been locoing
you will have been locoing
they will have been locoing

Past Perfect Continuous
I had been locoing
you had been locoing
he/she/it had been locoing
we had been locoing
you had been locoing
they had been locoing

Conditional
I would loco
you would loco
he/she/it would loco
we would loco
you would loco
they would loco

Past Conditional
I would have locoed
you would have locoed
he/she/it would have locoed
we would have locoed
you would have locoed
they would have locoed

Collins English Verb Tables © HarperCollins Publishers 2011

loco

A Mexican Spanish word meaning crazy.

ThesaurusAntonymsRelated WordsSynonymsLegend:

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Adj.

loco - informal or slang terms for mentally irregular; "it used to drive my husband balmy"

bats,batty,bonkers,buggy,crackers,daft,dotty,haywire,kookie,kooky,around the bend,balmy,nuts,round the bend,wacky,whacky,nutty,barmy,loopy,fruity,cracked

insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"

loco

adjective

Slang. Afflicted with or exhibiting irrationality and mental unsoundness:

brainsick,crazy,daft,demented,disordered,distraught,dotty,insane,lunatic,mad,maniac,maniacal,mentally ill,moonstruck,off,touched,unbalanced,unsound,wrong.

Informal:bonkers,cracked,daffy,gaga,loony.

Slang:bananas,batty,buggy,cuckoo,fruity,nuts,nutty,screwy,wacky.

Chiefly British:crackers.

Law:non compos mentis.

Idioms:around the bend, crazy as a loon,mad as a hatter,not all there,nutty as a fruitcake,off one's head,off one's rocker, of unsound mind, out of one's mind, sick in the head,stark raving mad.

Translations

loco

n (Railinf) →Lokf (inf)

loco

adj (esp USinf) →bekloppt(inf);he’s goneloco →derspinnt(inf)

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

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References in classic literature?

For so Livy (after he had described Cato Major in these words, In illo viro tantum robur corporis et animi fuit, ut quocunqueloco natus esset, fortunam sibi facturus videretur) falleth upon that, that he had versatile ingenium.

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An' the big roan's goin'loco. Everybody thought it was his teeth, but it ain't.

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No sooner'd I get some intimate with one of them he'd up and die--all but a fireman named Andrews, and he wentloco for keeps.

Either she had gone cleanloco or this was her idea of a joke.

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She wentloco. She always said the heat of the cooking would get her, and it did.

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I keep rememberinglocoed horses I used to see on the range when I was a boy.

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Wall Street analysts see El PolloLoco reporting earnings of 21 cents per share on sales of $113.47 million.

A Preview Of El Pollo Loco's Q2 Earnings