I think a big part of the 'slop' term should be associated with people who use it to either deceive others or just flood a place with low quality stuff.

It is a matter of opinion but many brandish the term around a little to freely. Some times justified, other times just folks trying to grab some power over others.

FWIW "slop" seems to have become a more general slang nowadays, i see people use it on Discord and Twitch to describe all sorts of stuff often unrelated to AI.