Iffy

From Fresh Dictionary

English

Adjective

iffy (comparative iffier, superlative iffiest)

1. (slang) Of dubious authenticity, legitimacy or legality.

   He's selling new CD players for £20 each - that sounds a bit iffy to me.

Synonyms

• (of dubious authenticity, legitimacy or legality):
  • (standard): dubious
  • (colloquial/slang): dodgy, fishy