Told my girlfriend that my mom is deaf, so speak loud and slow. Told my mom that my girlfriend is retarded.
Why are you making fun of people will disabilities? Do you have a problem with them?
I've just found people with mental illnesses are a lot less smarter than those who are not mentally ill.
Thinking that people with mental illnesses are less smarter than you feels very insensitive and something that a person that's uncaring would say. If you have a personal friend or a family member that have disability, I suggest that you care for them or if you couldn't, try to hire a helper so that their lives would be a little bit easier and they can focus on things that would make them strive.