The term "mop-top" most commonly refers to a hairstyle characterized by long, shaggy hair that falls across the forehead and ears. Synonyms for this term might include "shaggy-haired," "long-haired," or "bewhiskered." Other words that might describe a mop-top haircut include "disheveled," "messy," or "unkempt." These words all carry similar connotations of an informal, carefree style that is often associated with youth and rebellion. While the term "mop-top" originated in the 1960s to describe the Beatles' signature haircuts, it is still used today to describe a variety of hairstyles that share similar characteristics.