嘘うそ松まつ

noun

obviously fake story; likely untrue post

Internet slang for a social media post or story that is almost certainly a lie, often used jokingly or to call out fabricated content.

• また嘘うそ松まつが流ながれてきた。

  Another obviously fake story is going around.

• その投とう稿こう、どう見みても嘘うそ松まつだろ。

  That post is clearly a made-up story, isn't it?