Frou-frou is a descriptive term that is often used to describe the rustling sound of a woman's clothing, especially when it is overly embellished or flouncy. Some synonyms that can be used to describe the same sound or style could be lavish, frilly, ornate, extravagant, lavish, ostentatious, grandiose, or flamboyant. These synonyms have similar meanings in terms of being over-the-top or excessive and can be used to describe anything from clothing to decor and even behavior. Whether you are talking about a frou-frou ball gown or an ostentatious display of jewelry, these words can help you to paint a vivid picture of excess or indulgence.