Blase (Adjective) — Very sophisticated especially because of surfeit; versed in the ways of the world. ex. "the blase traveller refers to the ocean he has crossed as 'the pond'"
Blase (Adjective) — Uninterested because of frequent exposure or indulgence. ex. "his blase indifference" ex. "a petulant blase air"
Blase (Adjective) — Nonchalantly unconcerned. ex. "a blase attitude about housecleaning"