@SMickey,
Showy = flashy, expensive, opulent. You are dressing to show off in some way. Expensive jewellry maybe, or top end designer dress/shoes etc.
Loud = wearing bright, gaudy colours with no real sense of style or coordination.
Revealing = Showing more flesh than is normal. In Iraq, a woman's ankle would be considered too revealing (as it was in Victorian Britain), but in most western countries, little is left to the imagination nowadays, as Chai's picture demonstrates.