The term "street urchin" refers to a child who is living and begging on the streets, usually in urban areas. There are several synonyms for this term, including "gutter snipe," "ragamuffin," "urchin," and "waif." These words all describe a similar concept, but each has its unique connotation. For example, "gutter snipe" often connotes a child who is dirty and unkempt, whereas "waif" suggests a child who is alone and vulnerable. In any case, all of these terms refer to a child who is in a precarious situation, and they should be treated with compassion and care.