This is a highly offensive word and should be stricken from our modern vocabulary. Some people here have family or friends with mental disabilities and this is very insulting. Rani you're a good kid and I'm sure you meant no harm, but you're better than that.
Replace "retard" with the word "Stupid". To ignorant people, they may be offended. I'm no grammar expert but the word was used as a verb and not as a noun. No-one was specifically called a "retard". Now, let's get on with the discussion.
The politically correct movement has gone too far...
What about freedom of speech - the 1st amendment...
There used to be a saying when I was a kid, "Sticks and stones may break my bones, but names can never hurt me...." It seems to have been long lost....
If you don't like the word, just ignore it and move on... Don't get so butt-hurt over it...
My timing is too far "Down Syndrome" so I had to "honor student" it to make it run better.... (That sounds gay - no offense to any gay people...)