A worse variant of this is when people use a name that their listeners wouldn't, e.g. using "Mom"/"Dad" with a non-sibling instead of "my mom"/"my dad", as in:

A worse variant of this is when people use a name that their listeners wouldn't, e.g. using "Mom"/"Dad" with a non-sibling instead of "my mom"/"my dad", as in: "Dad is in the hospital." Seems weirdly self-centered to use a name that your listener wouldn't use when addressing the same person.