The term "skidrow bum" refers to a person who is often homeless and living on the streets due to their addiction to drugs or alcohol. However, such a term can be derogatory and insensitive. Therefore, it's better to use politically correct synonyms. Some alternative expressions you can use include "homeless person," "street dweller," "person experiencing homelessness," or "someone living on the streets." Using a less stigmatizing vocabulary doesn't change the challenging situation that thousands of people experiencing homelessness face daily. However, it's a small step towards less judgmental and more compassionate communication.