Its how you describe to someone that you are absolutely flat on your back from influenza or a cold and unable to even stand up to do the most menial tasks in life like going to the bathroom or eating
Bill: I heard that you have the flu, how are you feeling?
Tom: Well Bill , I happen to feel like Run Over Rubber Dog Shit, its absolutely terrible
An overly excited homosexual, can be used in an endearing or insulting manner
Man 1: There's a gay guy skipping and showing off his Barbie collection
Man 2: What a Power Homo!