some games that looked old (like Animal Crossing)
There’s a good reason for that one: the first animal crossing game was originally made for Nintendo 64, though that version was only released in Japan. GameCube got a port of it and that port (plus some extra features) is what released in English.
I have not once ever seen anyone shorten the name of a Debian release like that and I’ve been following/using Debian things for two decades.
Squeeze, Wheezy, Jessie, Stretch, Buster, Bullseye, Bookworm, and Trixie aren’t “ds”, “dw”, “dj”, “ds” again, “db”, “db” again, “db” for a third time in a row, or “dt”. Both stable and sid are “s” too.