I recently watched an interview where the interviewee (a native speaker from the US) used the word female to refer to a woman. Instead of describing the context of this word usage, I will point you to directly to the source (or more precisely to the last minute of it): Henry Rollins: The One Decision that Changed My Life Forever
Why did he use the word female instead of woman when he said "…maybe I would have gotten some female pregnant"? Could it be that it is meant to be understood in a (slightly) pejorative way?