Gaudy, fabulous, ostentatious, and in your face; brilliantly and excessively showy on the borderline of tacky but still classy. Used mostly to describe one's outfit, hair, accessories, and overall demeanor. The bigger, the louder, the more offensive.
"I love your new Louis Vuitton bag! It's so offensive!"
"That woman's hair is so big and offensive!"
"That outfit is so bright and offensive!"