please be mindful not to casually use bigoted terms that are demeaning to others with respect to their abilities, disabilities, mental health, etc (e.g. cr*zy, id**t, m*r*n, n*tj*b, d*mb). it can be a hard habit to break. i've occasionally slipped. just keep trying.
if you don't know much about ableist language, by all means feel free to look it up. plenty have written about it, why it's bad, & things you can say instead.
here's one link: http://www.autistichoya.com/p/ableist-words-and-terms-to-avoid.html