adj.
 (flimsier, flimsiest)
   - weak and insubstantial.
- light and thin:![]()  a flimsy garment. 
- (of a pretext or account) weak and unconvincing.
n.
 (pl. flimsies)
 Brit. very thin paper. 
▸a copy of a document, made on very thin paper.
Derivative
  
    - flimsily adv.
- flimsiness n.
 
  Etymology
  C18: prob. from flimflam.