cortina de fumaça angolul

red herring▼(misleading clue)
noun
[UK: red ˈher.ɪŋ] [US: ˈred ˈher.ɪŋ]

smokescreen [smokescreens]▼(smoke used as a disguise, mask or cover)
noun
[UK: ˈsməʊk.skriːn] [US: ˈsmoʊk.skriːn]