derp UK /dɜːp/US /dɝp/noun 3verb 3exclamation 2forms 3 noun3 •The constant repeating of an opinion after facts have proved it incorrect, especially as a rhetorical tactic.English has no word for "the constant, repetitive reiteration of strong priors". Yet it is a well-known phenomenon in the world of punditry, debate, and public affairs. On Twitter, we call it "derp". — 2013 •(slang) A stupid mistake, stupidity. •(slang) A person who acts stupidly or foolishly; a person who derps. verb3 •(slang) To act stupidly or foolishly. •(slang) To make a stupid mistake.Wait, so we're allowed to have magic items from the start? I must of derped pretty hard. — 2011 •(slang) To have one's eyes pointing in different directions; to exhibit strabismus.Also, there was a Derpy cameo in this one, but she didn't have derped eyes. — 2012 exclamation2 •(slang) Draws attention to an act of foolishness or stupidity.I put chips in my soup instead of crackers. Derp. •(slang) A placeholder for unimportant details, blah blah blah.Rob Schneider derp dee derp. Derp dee derpity derpy derp. Until one day, a derp a derp a derp a derp. — 2002 formsderped · derping · derps