Synonyms of out to lunch

out to lunch

phrase

1

as in insane

slang having or showing a very abnormal or sick state of mind

That old fellow is out to lunch if he believes those stories about a giant creature living in the lake.

Synonyms & Similar Words

• insane
• crazy
• nuts
• mad
• psychotic
• lunatic
• paranoidal
• psycho
• loony tunes
• mental
• foolish
• looney tunes
• around the bend
• crackbrained
• paranoid
• non compos mentis
• looney
• unreasonable
• maniac
• irrational
• gaga
• cuckoo
• crackers
• daft
• screwy
• bonkers
• unsound
• wacky
• maniacal
• balmy
• loony
• wacko
• demented
• nutty
• whacky
• crazed
• off
• haywire
• whacko
• meshugge
• kooky
• unbalanced
• bedlam
• meshugah
• daffy
• strange
• certifiable
• fruity
• brainsick
• ballistic
• batty
• moonstruck
• cranky
• eccentric
• unhinged
• obsessed
• loco
• deranged
• kookie
• scatty
• crackpot
• off one's head
• out of one's mind
• barmy
• hysterical
• odd
• meshuga
• wud
• bughouse
• off one's gourd
• off one's rocker
• disturbed
• bats
• hysteric
• cracked
• meshuggah
• depressed
• tetched
• aberrant
• loopy
• dotty
• delirious
• schizoid
• oddball
• delusional
• fey
• neurotic
• senseless
• distraught
• teched
• schizophrenic
• disordered
• paranoiac
• nuclear
• frantic
• delusionary
• paranoic
• sociopathic
• potty
• pixilated
• pixillated
• distracted
• queer
• obsessive-compulsive
• witless
• bananas
• touched
• amuck
• amok
• berserk
• ape
• haywire
• wigged-out
• frenzied
• monomaniac
• fixated
• monomaniacal
• raving

Antonyms & Near Antonyms

• reasonable
• sound
• balanced
• compos mentis
• sane
• rational
• clear
• wise
• normal
• uncrazy
• sensible
• lucid
• healthy
• judicious
• well-adjusted
• unneurotic

2

as in stupid

showing or marked by a lack of good sense or judgment

He thought anyone who wanted to go skydiving was out to lunch.

Synonyms & Similar Words

• stupid
• silly
• foolish
• crazy
• absurd
• insane
• mad
• simple
• lunatic
• weak
• idiotic
• idiotical
• irrational
• ridiculous
• featherheaded
• looney
• unwise
• simpleminded
• senseless
• cuckoo
• daft
• nonsensical
• zany
• inept
• wacky
• tomfool
• soft
• fatuous
• dumb
• dippy
• balmy
• nutty
• preposterous
• loony
• unreasonable
• jerky
• whacky
• kooky
• screwball
• half-baked
• dotty
• daffy
• harebrained
• sappy
• witless
• brainless
• asinine
• slow
• thick
• crackpot
• unreasoning
• cockeyed
• weak-minded
• bubbleheaded
• fool
• dense
• lunkheaded
• kookie
• moronic
• half-witted
• opaque
• mindless
• unreasoned
• fallacious
• imbecile
• obtuse
• fatuous
• feebleminded
• clueless
• vacuous
• thoughtless
• ludicrous
• thickheaded
• doltish
• dim
• pinheaded
• dopey
• unsound
• unintelligent
• brain-dead
• illogical
• boobish
• softheaded
• witless
• dunderheaded
• chowderheaded
• imbecilic
• surd
• laughable
• oafish
• invalid
• dorky
• empty-headed
• farcical
• dull
• nonrational
• chuckleheaded
• slow-witted
• gormless
• airheaded
• notional
• knuckleheaded
• dim-witted
• clownish
• lamebrain
• lamebrained
• ill-advised
• buffoonish
• unconsidered
• dopy
• birdbrained

Antonyms & Near Antonyms

• wise
• sensible
• prudent
• sound
• bright
• reasonable
• intelligent
• clever
• sage
• valid
• smart
• sane
• logical
• rational
• sagacious
• sapient
• judicious
• brainy
• well-advised