cat slide
n.— «Furzemoor Cottage is a pretty home with a wired thatch roof (extensively re-thatched in 2003) with wide eyebrow windows and a “cat slide”—the term for a section of a roof that is extended to cover a lean-to or side room, so that it sweeps down from the ridge nearly to the ground, particularly appealing to the eye when it is thatched.» —“Chocolate-box pretty for Easter” Henley Standard (United Kingdom) Apr. 14, 2009. (source: Double-Tongued Dictionary)