Yes, that's exactly what it implies, which is why it us such a good descriptor. I happen to be one of those people often considered 'retarded'. I understand from first hand experience what its like to be on the receiving end of the word used in hatred and fear. I also understand that it is just a word that when used in certain contexts can mean nothing more than a simple and innocuous "deer be really dumb". I am not the one struggling to understand what my language implies, I am simply choosing to ignore that specific social rule because my experience in life has led me to believe it to be fucking stupid. There exists a land in which things are not constantly blown out of proportion by over-reactivity and blind offendedness where real conversation (and humor) can occur, this is clearly not that land.