WordWeb Online

1. Very sophisticated especially because of surfeit; versed in the ways of the world
   "the blasé traveller refers to the ocean he has crossed as 'the pond'"
   - worldly
    
2. Uninterested because of frequent exposure or indulgence
   "his blasé indifference"; "a petulant blasé air"
   - bored
    
3. Nonchalantly unconcerned
   "a blasé attitude about housecleaning"

See also: sophisticated, unconcerned, uninterested