It is unprofessional, you wouldn't hear that at Delta, United, or AA indoc class and it isn't cool anymore either. Commenting on the course eval sheet is the right thing to do, eventually someone is going to get really offended and it is going to end badly. Don't take the machismo route and say people are being Ps. If you repeated some of that stuff in any Fortune 500 company you would be disciplined or fired pretty quickly. That is just the world we live in today and if you don't have the self awareness to know that maybe you don't need to be teaching indoc. Elevate your humor beyond 6th grade locker room talk because it is possible to be funny without demeaning certain groups of people, some of which may be in the new hire class.