Literal Translation: Steel straight man / cast-iron dense male
Actual Meaning: A guy whose emotional density is literally indestructible; flirtation, hints, and romantic ambiance bounce off his armor like rubber bullets.
Western Meme Parallel: Unflirtable dense brick / Diamond-grade oblivious bro
Select who you are talking to to see if this slang is safe or fatal:
The intensified upgrade of '直男', describing men who are utterly immune to feminine wiles and romantic subtlety.
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