shift dress       
noun [ C ] uk/ˈʃɪft ˌdres/ us/ˈʃɪft ˌdres/ (also shift)
 直筒连衣裙
a simple dress that hangs loosely from the shoulders
  She was wearing a plain white cotton shift dress. 她穿着一件普通的白色棉质直筒连衣裙。 
 Shift dresses are often quite shapeless, and if you don't have slim legs they can be unflattering. 直筒连衣裙通常没有什么形状,如果你的腿不够细,穿着就不会好看。 
 - More examples
 - I picked up a great printed shift dress for £25.
 - Today she was wearing a snakeskin sleeveless shift dress.
 - I much prefer them to those Sixties-inspired shift dresses that have been around for the past few months.