A broad term that encompasses demeaning attitudes and treatment towards individuals of the female gender. It often results from ignorance on the behalf of men and women alike.
Jane: I think I am going to enroll in medical school.
John: Haven't you received the memo that admission is only open to those with a Y chromosome?
Jane: Oh, really? They failed to mention that in Cosmo Magazine.
John: Go back to the kitchen and bake me some pie.
Elizabeth: You guys are both perpetuating sexism.