Poppycock/ˈpɑːpikɑːk/ Definition 1 of 1Pro Tip 1/3Colloquial Use Used in informal conversations among friends or on comedic occasions. When he claimed he could fly, we all agreed it was poppycock. Pro Tip 2/3Express Disbelief Expresses strong disbelief, like calling out a bluff or a silly lie. Poppycock! There's no way you saw a unicorn. Pro Tip 3/3Mild Humor Often conveys a light-hearted rejection of something said, not to be taken too seriously. He says he's the world's best cook? Well, that's poppycock!