good-time girl

noun2

1. •
   (euphemistic) A young woman who engages regularly in partying and romantic or sexual liaisons.

   • "I'm a good-time girl. Clothes, music, lights, dancing and liquor-what else is there when a girl is young?" — 1936
2. •
   (euphemistic) A female prostitute.

   • We hadn't been out of the bar very long when a small, young Korean boy came up to us and wanted to know if we wanted good-time girls. — 2006