bla·sé 
(blä-zā)
(blä-zā)adj.
1. Uninterested because of frequent exposure or indulgence.
2. Unconcerned; nonchalant: had a blasé attitude about housecleaning.
3. Very sophisticated.
[French, from past participle of blaser, to cloy, from French dialectal, to be chronically hung over, probably from Middle Dutch blāsen, to blow up, swell; see bhlē- in the Appendix of Indo-European roots.]