(slang) A person who acts stupidly or foolishly; a person who derps.

(slang) A stupid mistake, stupidity.

(uncountable) The constant repeating of an opinion after facts have proved it incorrect, especially as a rhetorical tactic.

(slang) To act stupidly or foolishly

(slang) To make a stupid mistake

(slang, of eyes) To point in different directions; To have a facial expression with one's eyes pointing in different directions.

(slang) Draws attention to an act of foolishness or stupidity.

(slang) A placeholder for unimportant details, blah blah blah.