horsefeathers

[ hawrs-feth-erz ]
/ ˈhɔrsˌfɛð ərz /
Slang.

noun

(used with a singular or plural verb) something not worth considering.

interjection

rubbish; nonsense; bunk (used to express contemptuous rejection).

Origin of horsefeathers

1925–30, Americanism; horse + feathers, as euphemism for horseshit