I use the "you are" retort but so ironically that I intentionally use the lamest option available to me - because I'm trying to emphasize how unmotivated I am to actually be insulting and it annoys my wife.
For instance, she'll hold up an empty pill bottle or something and call it her "used gum receptacle".
I'll say "you're used gum".
It enrages her, because I had a perfect opportunity to say "you're a receptable" which is far more cutting and chock full of double entendre, but I wasted it. That's just not my style man.