The term "tart up" is commonly used to describe someone who dresses or styles themselves in a provocative or over-the-top manner. However, there are many synonyms for this phrase that can be used instead, depending on the context. Some of these include "glam up" or "dress up" to describe someone who is making themselves look more attractive or fashionable. Other synonyms like "spiff up" or "spruce up" can be used to describe someone who is tidying or polishing their appearance. In a more negative context, the term "gussy up" or "doll up" could be used to describe someone who is putting on an artificial or insincere appearance.