知らない (shiranai) can be a pretty biting way to say you don't care about something/someone's situation, but it's not vulgar. しらねぇ (shiranee) would be a more vulgar way to say the same thing, that's probably closer. I don't know if there's a metaphorical idiomatic phrase like the other languages in the OP.
People tweeting stuff. We allow tweets from anyone.
RULES:
Mark NSFW content.
No doxxing people.
Must be a pic of the tweet or similar. No direct links to the tweet.
No international politcs
Be excellent to each other.
Provide an archived link to the tweet (or similar) being shown if it's a major celebrity, figure or any politician. If you replace the "x" at their site with xcancel (so it beomes xcancel.com), and you're not on mobile, it will save video. https://web.archive.org/save is another great option. Archive.is is no longer recommended because they remove/alter content.
If a tweet (or similar) makes a statement of fact, either mark it as "satire" in the body or provide the original source link backing up the statement
知らない (shiranai) can be a pretty biting way to say you don't care about something/someone's situation, but it's not vulgar. しらねぇ (shiranee) would be a more vulgar way to say the same thing, that's probably closer. I don't know if there's a metaphorical idiomatic phrase like the other languages in the OP.
For vulgarity in Japanese in general, you should watch this: https://youtu.be/GcjbwkBQeO8