Take something you believe in with all your heart, something amazing to you, something that you are in awe of, something you can not live without, something that gives you that feeling of pure joy and love. Give that something the name "rex". Got it? Really try to believe that REX is that certain something.
Now pretned REX is the word people use to make fun of other people, it's used instead of "stupid", it's used when someone goofs up. But...it's your most wonderful possesion, your greatest feeling and you know that a few selected others feel the same as you. How could it be? Certainly we don't mean it to be cruel but what other purpose could it serve?
Maybe start using REX instead of retard!