derp

باللغة العربية: أَحْمَق، حَمَاقَة، غَبَاء

1. A person who acts stupidly or foolishly; a person who derps. (slang)
2. A stupid mistake, stupidity. (slang)
3. The constant repeating of an opinion after facts have proved it incorrect, especially as a rhetorical tactic. (uncountable)

الجمع derps