drainpipe        
noun [ C ] uk/ˈdreɪn.paɪp/ us/ˈdreɪn.paɪp/
 排水管,泄水管
a pipe that carries waste water or sewage away from buildings
 drainpipes [ plural ] UK 紧身裤
trousers that are very tight all the way down the legs
  There's an old photo of my dad looking really cool in a pair of drainpipes.
 I wanted drainpipes but the shop only sold flares.
 It was the only place on the Kings Road where you could get drainpipes.
 He was wearing a black, fitted jacket, and matching drainpipes.
 I really wanted a pair of drainpipes.