Oh, horsefeathers! You're nuts!Horsefeathers! I did no such thing!
horsefeathers
slang Nonsense or foolishness. Often used as an exclamation to emphasize that something is nonsense. Oh, that just horsefeathers, and you know it.Horsefeathers! That's a total lie!
Horsefeathers!
exclam. Phooey!; Nonsense! Horsefeathers! I did no such thing!