traying
n.— «Some students, however, decide to head straight to Observatory Hill, adjacent to Elizabeth Waters Residence Hall, for sledding after the heavy snowfall. Thrifty individuals without sleds often use cafeteria trays to slide down the slick, steep hill, an activity fondly known by Madison students as “tray-ing.”» —“Snowy fun flying across Madison” by Carly Stingl in University of Wisconsin-Madison Badger Herald Feb. 14, 2008. (source: Double-Tongued Dictionary)