This thread reminds me of a funny story I overheard someone tell her a friend one Purim.
She was a teacher in a not-Frum or very modern school. On Rosh Chodesh Adar, the kids come to school dressed up. One girl was wearing normal clothes, so she asked her, “Aviva, why didn’t you dress up?” Aviva responded, “I am dressed up. I’m dressed as a ‘Dosi’ (frummy).”
I guess one person’s clothes are another person’s costume! It’s actually a sad story, but it was also funny.