Yeah, multiple times, in both a casual and offensive manner.
I'm never really able to tell when people are joking when they say "there is something wrong with you", "you're mentally ret*d", etcetera.
It's for this reason I refrain from mentioning my AS. People don't understand enough about it. AS is autism without mental retardation, yet people just use it as a swear anyway.
I don't even think it's about mental retardation, simply about hurting those who aren't NTs.
I've been called it laughingly by family, by acquaintances, as well as insultingly.
It hurts every time but what am I meant to say? "Don't call me ret*d, it's hurtful because I have AS"? Doesn't that just give them more ammunition and justification in their minds?