bit of fluff

noun2

1. •
   (offensive) An attractive woman, especially a companion or sexual partner to whom one is not seriously committed.

   • As Sammy settled down for the night, he said, “That bit of fluff who owns the farm's a looker.” — 1999
2. •
   Something attractive or amusing but insubstantial.

   • “When we finished lunch,” said Rob, “Kim changed into that little bit of fluff, the same bit of fluff you bought the other day. — 2012