Pent·house n. A shed or roof sloping from the main wall or building, as over a door or window; a lean-to. Also figuratively. “The penthouse of his eyes.”
Pent·house, a. Leaning; overhanging. “Penthouse lid.” --Shak. “My penthouse eyebrows.” --Dryden.
n : an apartment located on the top floors of a building