Most people, whether they have dwarfism or not, would prefer to be called by their name. When referring to a person with dwarfism such terms as Little People, LP, Person of short stature or Person with a form of dwarfism are all OK. Most people with dwarfism are OK with being called a dwarf. Calling anyone silly names can be hurtful even if you are just kidding around. You should really try to learn someone’s name and use it. I am sure that is what you would prefer.