bachelor pad       
noun [ C ]  informal uk/ˈbætʃ.əl.ə ˌpæd/ us/ˈbætʃ.əl.ɚ ˌpæd/
 单身男子公寓,单身汉公寓
a home suitable for or typical of a young man who is not married
  This is surely one of the coolest bachelor pads in all of Los Angeles. 这绝对是整个洛杉矶最酷的单身汉公寓。 
 - More examples
 - The living room resembles a typical bachelor pad, with a flat-screen television mounted on the wall facing a beanbag chair.
 - My fans might think I live in some sort of bachelor pad, with people running in and out.
 - He and his co-worker share a pathetic bachelor pad.
 - a grungy bachelor pad, strewn with old socks and stocked with beer