Uh drapes, you know, heavy curtains. A commonplace word for any thermal or blackout curtains, used in a large part of america I'm pretty sure but also from where I am.
Theres also just generally the expression 'does the curtain match the drapes' which is a suggestive slang expression, which again, is still an in-use expression.
There isn't even one 'niche' usage case for this, but at least three
Anyway this is a reminder that microsoft; minecraft, banned the word 'japan' because it contained the first three letters, which was assumed to be a shorthand insult regarding the race itself and not the country.
Regex usually is stupid and can't account for every edge case, and so must assume things and it's up to humans to actually think when they encounter something outside of that.