A retard!!
DS1 has tourettes and has many motion and verbal tics (nothing rude)
A child in his class was mimicking his facial tics and when DS ask him to stop he called DS a retard.
DS was upset but came back with I am not a retard, I have a condition, you on the other hand are an ignorant prat [
I hate people like this and I just want to scream in the childs face (lots of things rude)