horsefeathers

[hawrs-feth-erz]Slang.
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interjection
  1. rubbish; nonsense; bunk (used to express contemptuous rejection).

Origin of horsefeathers

1925–30, Americanism; horse + feathers, as euphemism for horseshit
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


Word Origin and History for horsefeathers
n.

"nonsense," 1928, said to have been coined by U.S. cartoonist Billy De Beck; perhaps a variant of horseshit "nonsense," though the latter is attested only from 1940s.

Online Etymology Dictionary, © 2010 Douglas Harper