noun

1. Thin typing paper used to make multiple copies.

2. A service certificate

3. (in the plural) Skimpy underwear.

adjective

1. Likely to bend or break under pressure.

   “He expected the flimsy structure to collapse at any moment.”

2. Weak; ill-founded.

   “a flimsy excuse”

Synonyms: feeble, unconvincing, weak, flexible, fragile, shaky, weak