flimsy

adjective, flim·si·er, flim·si·est.

1. without material strength or solidity: a flimsy fabric; a flimsy structure.
2. weak; inadequate; not effective or convincing: a flimsy excuse.

noun, plural flim·sies.

3. a thin kind of paper, especially for use in making several copies at a time of an article, telegraphic dispatch, or the like, as in newspaper work.
4. a copy of a report or dispatch on such paper.

adjective -sier or -siest

1. not strong or substantial; fragilea flimsy building
2. light and thina flimsy dress
3. unconvincing or inadequate; weaka flimsy excuse

noun

4. thin paper used for making carbon copies of a letter, etc
5. a copy made on such paper
6. a slang word for banknote