loony

Meaning

Adj

1. (informal) Insane.
2. (informal) Very silly, absurd.

Noun

An insane or very foolish person.

Synonyms

nuts

lunatic

crazy

fruity

around the bend

batty

madman

mad

bats

loco

nutcase

loopy

balmy

barmy

bonkers

crackers

daft

insane

looney

nut

nutter

nutty

round the bend

whacky

loonie

berserk

madwoman

maniac

maniacal

meshugge

kooky

cracked

haywire

buggy

kook

dotty

kookie

wacky

weirdo

half-witted

potty

psycho

stark staring mad

stupid

unbalanced

wacko

zany

addlehead

doolally

meshuggeneh

meshuggener

off one’s chump

off one’s nut

out of one’s mind

off one's trolley

bughouse

looby

rompish

barking

off one’s rocker

off one’s trolley

squirrely

addle-head

nut case

barking mad

off one’s rocket

luny

deranged

dumb

fool

foolish

cuckoo

idiotic

imbecilic

nutso

reality challenged

brainless

berserker

mental

moronic

non compos mentis

nutzoid

basket case

ga-ga

crazy as a loon

of unsound mind

one brick short of a full load

over the edge

Pronounced as (IPA)

/ˈluːni/

Etymology

Shortened from lunatic, and likely also from loon ("rascal", and also the bird) + -y.