often times, it'll be a flippantly uncharitable term with a case of "schrodinger's insult", where it can be made to appear unserious and funny despite easily being interpreted as dehumanizing. i mostly am weary of how heavily ambiguous and context-dependent it is, makes communication and interpretation really hard
tangentially related, "degenerate" (noun), because i can't readily think of an example right now that isn't just something someone would use as a slur
on that note, most slurs, lol