When it comes to dressing up, there are plenty of ways to say that you're getting ready to impress. Some synonyms for "get dressed up" include "deck out," "doll up," "spruce up," and "polish up." You might also say that you're "donning your Sunday best," or "suiting up" for a special occasion. Other phrases could include "dressing to the nines," "putting on your glad rags," or "getting gussied up." No matter what words you choose, the ultimate goal is to look and feel your best, whether you're headed out for a night on the town or just want to impress your friends and family.