blase

very sophisticated especially because of surfeit; versed in the ways of the world; "the blase traveler refers to the ocean he has crossed as `the pond'"; "the benefits of his worldly wisdom"

uninterested because of frequent exposure or indulgence; "his blase indifference"; "a petulant blase air"; "the bored gaze of the successful film star"

nonchalantly unconcerned; "a blase attitude about housecleaning"