Kopfart
Kopfart is a German slang term formed from Kopf (head) and fart, used humorously to describe a thought, remark, or proposal that is perceived as silly, nonsensical, or intentionally provocative. It denotes something that emerges in the mind but is not taken as a serious idea, often in a self-deprecating or teasing way.
Etymology and usage: The term is informal and primarily found in online chat, social media, and youth
Geographic and demographic context: Kopfart is most common in German-speaking online communities and among younger speakers.
See also: Kopfkino, a related German slang term describing vivid mental imagery; German internet slang and memes,