derp

Draws attention to an act of foolishness or stupidity.

I put chips in my soup instead of crackers. Derp.

Now that I think of it, i'm surprised that you didn't make fun of his first name as well- 'How could you believe in a guy who has a girly first name?' derp- you are a fool.

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.

Me: Hi, remember me from SSG? Can I ask you about herping the derp? R1: Oh, hai Tom. Sure, that would be the derp that was herping blah blah blah...

To act stupidly or foolishly.

To make a stupid mistake.

Wait, so we're allowed to have magic items from the start? I must of derped pretty hard.

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.

The eyes are wired to the same I2C address to prevent derping, but the three red mouth LED matrices are capable of displaying anything that fits on an 8×24 LED matrix.

A person who acts stupidly or foolishly; a person who derps.

A stupid mistake, stupidity.

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".