bit of fluff
1. A physically attractive woman. Primarily heard in UK, Australia. Jack knew he was the envy of all of his friends as he paraded around town with his new bit of fluff.
2. A derogatory term used to describe a woman who lacks value beyond being physically attractive. Primarily heard in UK, Australia. I can't believe my ex-boyfriend went out with that bit of fluff!
bit of fluff (or skirt or stuff)
a woman regarded in sexual terms. British informal 1937 W. Somerset Maugham Theatre It was strangely flattering for a woman to be treated as a little bit of fluff that you just tumbled on to a bed.