In the placeholder sense, often used with herp. Can be used like a noun or a verb or with various suffixes. Connotes that whatever it stands in for does not matter, and often that it is foolish or nonsensical.
(third-person singular simple present derps, present participle derping, simple past and past participle derped)
- To act stupidly or foolishly
- To make a stupid mistake
- (slang, of eyes) To point in different directions; (of a person) To have a facial expression with one's eyes pointing in different directions.
Possibly from the term duh, a sound indicating faltering speech and assumed stupidity, glottalized for emphasis.