vomit comet
n.— «Aspen partygoers, beware. Transportation officials have voted to hire a security firm to patrol the bus station and late-night buses on Fridays and Saturdays that commonly have to take drunken passengers home from Aspen. The bus service on those nights has been inauspiciously dubbed the “Vomit Comet.”…“I’ve been on the Vomit Comet before, and most of them aren’t true criminals.…They’re just drunk.”» —“Guards to Be Placed ‘Vomit Comet’ Buses” in Aspen, Colorado Washington Post Sept. 18, 2006. (source: Double-Tongued Dictionary)