What is another word for preposterous ?

not quite right in the head

Contrary to reason or common sense

flakey^US

flaky^UK

away with the fairies

not the full shilling

not right in the head

not right upstairs

as daft as a brush

off beam

dead from the neck up

stupidly irresponsible

as thick as two short planks

a few cards shy of a full deck

as mad as a March hare

demoniac

having bats in the belfry

flipped out

sick

deprived of one's wits

one card shy of a full deck

manic-depressive

over the edge

non compos

severely mentally ill

one sandwich short of a picnic

a few sandwiches short of a picnic

having kangaroos in the top paddock

without rhyme or reason

beyond the bounds of possibility

have bats in the belfry

have kangaroos in the top paddock

have bats in one's belfry

have kangaroos in one's top paddock

not in one's right mind

disorganised^UK

light

not with it

with a mind like a sieve

two sandwiches short of a picnic

thick as two short planks

with one's head in the clouds

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“It's an indulgent fantasy, saved by Chow's precise comic timing and the preposterous action sequences.”

Adjective

Contrary to reason, truth or logic

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Adjective

without a care in the world

Marked by humor or something that motivates laughter

flakey^US

flaky^UK

bright-eyed and bushy-tailed

full of the joys of spring

full of vim and vigour

colourful^UK

colorful^US

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Adjective

Significantly or brazenly odd or bizarre in nature

supercalifragilisticexpialidocious

never before encountered

never to be forgotten

marvellous^UK

marvelous^US

beggaring description

unequalled^UK

unrivalled^UK

unrivaled^US

unequaled^US

in a league of its own

like nothing on earth

previously unencountered

outside one's experience

beyond the realm of reason

top drawer

beyond one's wildest dreams

specialized^US

specialised^UK

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Adjective

Difficult to believe or unlikely to happen

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Adjective

Embellished to the point of being false or untrue

beyond the bounds of possibility

phony^US

not in the least likely

phoney^UK

flakey^US

flaky^UK

extremely difficult to believe

not to be thought of

extremely implausible

not able to hold water

rings phony

uncredible

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Adjective

beyond the bounds of possibility

Unable to be achieved or realized

not worth considering

beyond the realm of reason

not remotely possible

with no chance of success

impossible to carry out

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Adjective

financial means conditional

Unreasonable or inappropriate in magnitude

out of all proportion

uncivilised^UK

uncivilized^US

costing an arm and a leg

blown up out of all proportion

surplus to requirements

more than one can afford

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Adjective

Unconvincing from a logical perspective

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Adjective

out of touch with reality

Existing only in the realms of one's imagination

flaky^UK

flakey^US

idealized^US

idealised^UK

phoney^UK

phony^US

fantasized^US

fantasised^UK

product of someone's imagination

marvelous^US

created out of thin air

fantasizing^US

marvellous^UK

fantasising^UK

figment of someone's imagination

with your head in the clouds

coloured^UK

colored^US

imperceptible to the touch

pretentiously artistic

not backed up by evidence

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Adjective

That has been described as greater or better than it actually is

laid on with a trowel

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Adjective

staring someone in the face

Abhorrent or very undesirable

uncivilised^UK

uncivilized^US

unsavoury^UK

unsavory^US

too horrible for words

without justification

as plain as a pikestaff

standing out like a sore thumb

sticking out like a sore thumb

financial means conditional

strictly for the birds

stick out like sore thumb

agonizing^US

agonising^UK

more than one can afford

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Adjective

Startling, surprising or shocking in an unexpected way

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Adjective

Not appropriate to

like a fish out of water

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Adjective

Expressing or characterized by derision

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Adjective