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or loon·ey also lun·y (lo͞o′nē)Informal
adj. loon·i·er, loon·i·est also lun·i·er or lun·i·est
1. Extremely foolish or silly.
2. Mentally deranged; crazy.
n. pl. loon·ies or loon·eys also lun·ies
A foolish or crazy person.

[Shortening and alteration of lunatic, or from loon.]

loon′i·ly adv.
loon′i·ness n.


(ˈluːnɪ) ,




adj, loonier, looniest, lunier or luniest
1. lunatic; insane
2. foolish or ridiculous
n, pl loonies, looneys or lunies
a foolish or insane person
ˈlooniness, ˈluniness n


or loon•ey

(ˈlu ni)

adj. -i•er, -i•est, adj.
1. lunatic; insane.
2. extremely or senselessly foolish.
3. a lunatic.
[1860–65; lun (atic) + -y2]
loon′i•ness, n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.loony - someone deranged and possibly dangerousloony - someone deranged and possibly dangerous
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
lunatic, madman, maniac - an insane person
Adj.1.loony - informal or slang terms for mentally irregularloony - informal or slang terms for mentally irregular; "it used to drive my husband balmy"
insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"


1. Slang, insane, strange, mental (slang), mad, out there (slang), crazy (informal), nuts (slang), bananas (slang), barking (slang), raving, distracted, eccentric, frantic, frenzied, unstable, crackers (Brit. slang), batty (slang), crazed, lunatic, psychotic, demented, cuckoo (informal), unbalanced, barmy (slang), nutty (slang), deranged, delirious, rabid, bonkers (slang, chiefly Brit.), flaky (U.S. slang), unhinged, loopy (informal), crackpot (informal), out to lunch (informal), round the bend (Brit. slang), barking mad (slang), out of your mind, gonzo (slang), screwy (informal), doolally (slang), off your head (slang), off your trolley (slang), round the twist (Brit. slang), up the pole (informal), of unsound mind, as daft as a brush (informal, chiefly Brit.), lost your marbles (informal), not right in the head, non compos mentis (Latin), off your rocker (slang), not the full shilling (informal), off your nut (slang), off your chump (slang), wacko or whacko (informal) She's as loony as her brother!
1. (Slang) mad person, lunatic, nut (slang), psycho (slang), maniac, psychotic, madman, psychopath, nutter (Brit. slang), basket case (slang), nutcase (slang), madwoman, headcase (informal), mental case (slang), headbanger (informal) At first they all though I was a loony.


or looney
also luny
2. Informal. Afflicted with or exhibiting irrationality and mental unsoundness:
Informal: bonkers, cracked, daffy, gaga.
Chiefly British: crackers.
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.
Informal. A person regarded as strange, eccentric, or crazy:
Informal: crank, loon.


A. ADJ (loonier (compar) (looniest (superl))) → loco, chiflado
B. Nloco/a m/f
C. CPD loony bin Nmanicomio m
the loony left N (Brit) (Pol) (pej) → la izquierda radical


adjtimbré(e), cinglé(e) m/f
ntimbré(e) m/f, cinglé(e) m/floony bin nmaison f de fousloony left n (British) [Labour Party] the loony left l'aile extrémiste du parti travailliste


adj (+er)bekloppt (inf)
nVerrückte(r) mf (inf), → Irre(r) mf


loony bin
n (inf)Klapsmühle f (inf)
loony left (Brit Pol) (pej inf)
n the loonydie radikale Linke
adj attrlinksradikal


[ˈluːnɪ] adj & n (fam) → pazzo/a, matto/a