(名詞/現在分詞) 非法進入某建築物,然後登上屋頂或樓頂進行拍照。亦寫成 roof topping
rooftopper (名詞):非法進入某建築物,然後登上屋頂或樓頂進行拍照的人。

So long planking, and horsemaning—those trends are child's play compared to the new craze: rooftopping. Essentially, you get to a roof, go to the edge, look down, and snap a photo.
—Jen Carlson, "Vertigo-Inducing Trend: Rooftopping," Gothamist, August 12, 2011

Excited to share the experience with his friends, he soon convinced other photographers to join him on escapades, not only to the rooftops of skyscrapers, but also the tops of idle cranes.

It's a trend that's taken off, not only in Toronto, where he estimates there are now about 20 photographers "rooftopping," but in cities such as Boston and Chicago as well.
—Vidya Kauri, "Tom Ryaboi: fearless artist, rooftop seer — and just plain badass," The Globe and Mail, November 10, 2012