flimsy

You can describe weak, thin, and fragile things as flimsy. Onion smells are strong, onion skins are flimsy. Blaming onions for making you cry during a sad movie, that's a flimsy excuse, when there are no onions in the theater.

A flimsy object and a flimsy objection or excuse are both without weight and are easy to knock down. You can see right through a flimsy curtain, and you can see right through a flimsy lie. If a tent or house of cards is flimsy, it will fall down with a slight breeze, and if your story isn't convincing anyone, it's probably weak and flimsy enough to flatten, too.

Definitions of flimsy
1

n a thin strong lightweight translucent paper used especially for making carbon copies

Synonyms:
onionskin
Type of:
typewriter paper, typing paper
writing paper suitable for use in a typewriter

adj lacking solidity or strength

“a flimsy table”
flimsy construction”
Synonyms:
weak
wanting in physical strength

adj lacking substance or significance

Synonyms:
fragile, slight, tenuous, thin
insignificant, unimportant
devoid of importance, meaning, or force

adj not convincing

Synonyms:
unconvincing
unpersuasive
not capable of persuading
incredible, unbelievable
beyond belief or understanding
Antonyms:
convincing
causing one to believe the truth of something
credible
appearing to merit belief or acceptance
disenchanting, disillusioning
freeing from illusion or false belief
persuasive
intended or having the power to induce action or belief
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