Definitions of blase:

• adjective:   uninterested because of frequent exposure or indulgence

  Example: "His blase indifference"

• adjective:   very sophisticated especially because of surfeit; versed in the ways of the world

  Example: "The blase traveler refers to the ocean he has crossed as `the pond'"

• adjective:   nonchalantly unconcerned

  Example: "A blase attitude about housecleaning"

• name:  A surname (very rare: popularity rank in the U.S.: #34214)