Combination of the words "guy" and "arch". The word can be used to describe a male person's back arch during sex.
"His garch was exceptional. He put the other guys to shame."
Someone who is always on a floor. They perfer to sleep on the floor than in a bed. If they can be on the floor, they most likely will be on the floor.
"God look at Isaac. He's on the floor again even though there's a chair right there. What a floor whore!"