At first I thought it was a bad translation but the site says they’re HQed in Chicago so that seems a little unlikely (but not impossible). I wondered if it was the technical term (similar to how “spontaneous abortion” is actually a technical term for a miscarriage, shockingly), but I didn’t immediately find anything, but I also didn’t look super hard.

It’s archaic euphemistic jargon, and that’s why you generally don’t see it used outside of the niche.