If someone says "are you all dressed?", they mean do you have all your clothes on, are you done dressing. They could also say "are you dressed" and it means basically the same thing but it just adds a little bit of finality to it.Originally Posted by lynn
Consider this common exchange between my mother and me when I was little,
"Are you dressed?"
"Yea" <--- I'm lying
"So you are all dressed and ready to go?"
"Uhm... sort of"
It can also be used as you pointed out, all-dressed hamburger, or all-dressed pizza, usually meaning that the item has all the toppings on it. I haven't seen "all dressed" used in this way nearly as much as "fully dressed" which means the same thing.