In the past, the distinction between lady and woman used to be clearer:
woman = general word for a female adult
man = general word for a male adult
lady = an honorable woman with good manners and refined behavior
gentleman = an honorable man with good manners and refined behavior
Nowadays, however, there is not so much of a difference. Although the words lady and gentleman still carry some connotation of being refined and well-mannered, people often use the words even to describe people they don't know.
An old lady fainted at the train station and they had to call an ambulance.
Good evening, gentlemen. Can I get you anything to drink?
The word girl is usually only used for female children or adolescents. Adult women sometimes refer to their friends as girls, but it can be considered offensive for an adult man to refer to adult women as "girls."
The Detroit Pistons and the Chicago Bulls had a rivalry for Eastern Conference superiority in the late 1980s and early 1990s and it was a truly epic one for multiple accounts. In the early years of the rivalry, the Bad Boys from Detroit had their way with the imposition of the Jordan Rules. Those rules were Detroit s philosophy designed by head coach Chuck Daly to make the other Bulls besides Michael Jordan take the most important shots of the game.