Flimsy

Adjective

 * 1) Likely to bend or break under pressure; weak, shaky, flexible, or fragile.
 * He expected the flimsy structure to collapse at any moment.

Noun

 * 1) Thin typing paper used to make multiple copies
 * 2)  Skimpy underwear.

Adverbs for Flimsy
absurdly; airily; vaguely; tenuously; unreasonably; nonsensically; foolishly; slightly; ridiculously; miserably; wretchedly; contemptibly; pitifully; unmanageably; unserviceably; objectionably.

Synonyms for Flimsy
thin, transparent, inane, poor, trifling, puerile, slight, weak, superficial, gauzy, shallow, unsubstantial, feeble, jerry-built.

Antonyms for Flimsy
robust, strong, sturdy, thick, solid, opaque, heavy, substantial, firm, serious, sound, real, tough, unbreakable, stiff, tenacious, hard, durable.

Thesaurus
adulterated, airy, asinine, attenuate, attenuated, boyish, breakable, brittle, brittle as glass, catchpenny, cheap-jack, cobwebby, crackable, crisp, crispy, crumbly, crushable, cut, dainty, decrepit, delicate, delicately weak, diaphanous, dilapidated, dilute, diluted, effeminate, empty, ethereal, fatuous, feeble, filmy, fine, fine-drawn, finespun, fissile, flabby, flaccid, floppy, foolish, fracturable, fragile, frail, frangible, friable, fribble, fribbling, frivolous, frothy, futile, gaseous, gauzy, gimcrack, gimcracky, girlish, gossamer, gossamery, gracile, idle, implausible, improbable, inadequate, inane, inconceivable, inconclusive, incredible, infirm, insubstantial, jerry, jerry-built, lacerable, lacy, lax, light, lightweight, limp, loose, makeshift, misty, namby-pamby, nugacious, nugatory, otiose, paltry, papery, pasteboardy, poor, puny, ramshackle, rare, rarefied, relaxed, rickety, rubbery, scissile, shaky, shallow, shatterable, shattery, sheer, shivery, silly, sissified, sleazy, slender, slenderish, slight, slight-made, slim, slimmish, slinky, small, splintery, subtile, subtle, superficial, svelte, sylphlike, tacky, tenuous, thin, thin-bodied, thin-set, thin-spun, thinned, thinned-out, thinnish, threadlike, transparent, trifling, trite, trivial, unbelievable, uncompact, uncompressed, unconvincing, unproved, unrigorous, unsatisfactory, unsound, unsubstantial, unsustained, vacuous, vague, vain, vapid, vaporous, vulnerable, wasp-waisted, watered, watered-down, watery, weak, weakly, willowy, windy, wiredrawn, wispy, womanish