working girl

NOUN /wɜrkɪŋ_gɜrl/
12 LETTERS · STARTS WITH W

working girl is a valid 12-letter word worth 20 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
W4O1R1K5I1N1G2G2I1R1L1
4 + 1 + 1 + 5 + 1 + 1 + 2 + 0 + 2 + 1 + 1 + 1 =20 PTS
DOUBLE WORD → 40TRIPLE WORD → 60
MEANING

What does working girl mean?