Where can I wash up?
where (one) can wash up
A place in which one can wash one's hands or face or use the toilet; a restroom. "Can" and "one" are reversed when asking this as a question. You're very welcome to the manor. Jeeves here will show you where you can wash up before dinner. I got pretty dirty working in your garden. Where can I wash up before dinner?
Where can I wash up?and Is there some place I can wash up?
Euph. a way of asking where the toilet or bathroom is without referring to one's need to use it. (Of course, this is also appropriate to ask where one can wash one's hands.) The minute he got to the house, he asked Fred, "Where can I wash up?" Fred: Welcome. Come in. Bill: Oh, is there some place I can wash up?