The Wikipedia definition seems to indicate it has origins as a racist term and I’ve never understood why unix users have adopted this terms instead of something benign like “themes” or “theming” which I remember being in use long before I ever heard “rice”. So what gives? Why use “rice” instead of “theme”?
Never heard either, but ricer would clearly be racist as there’s no general contemporary reason for the word.
You could also say it is riceist
At first I assumed ricer referred to a kitchen tool that made vegetables into the shape and size of rice