horsefeathers!

horsefeathers!  {n. phr.},  {slang}
1. Not true; I don't believe what you're saying.
"Horsefeathers!" Brad cried. "I can't believe a word of what you said about Jessica."
2. Exclamation of disgust.
"Horsefeathers!" Fred cried. "We've just missed the bus."
Categories: exclamation noun slang