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this goes for gendered insults as well! I don't care how mad you are, or how much you dislike someone, it's still misgendering.
if a trans woman/fem person tells you to stop calling her "dude" or "bro" because it makes her feel dysphoric, then stop using those words as "gender neutral" and respect her boundaries.
if a trans man/masc person tells you to stop calling him "girl" or "bitch" because it makes him feel dysphoric, then just stop using those words as "gender neutral" and respect his boundaries.