Actually, lots of NTs think "neurotypical" is a slur, in the same way many non-trans people think "cis" is a slur. Both are just descriptive, whereas allistics (not a slur) who feel hostile to autistics for whatever reason, will often deliberately mispronounce/misspell it as "ass burgers".
My husband being one of those who hate the thought of being typical and so, I do try so hard to not say it to him, but unfortunately, sometimes feel I have no choice, because it fully explains things!