Flimsy

Part of speech: noun (n.)

1. Thin or transfer paper.

2. A bank note. [Slang, Eng.]

Part of speech: adjective (a.)

Weak; feeble; limp; slight; vain; without strength or solidity; of loose and unsubstantial structure; without reason or plausibility; as, a flimsy argument, excuse, objection. Proud of a vast extent of flimsy lines. Pope. All the flimsy furniture of a country miss's brain. Sheridan.

Synonyms: Weak; feeble; superficial; shallow; vain.