lackadaisical

adj

1. Showing no interest, vigor, determination, or enthusiasm.

   “the lackadaisical look on his face”

   “I, at one time, used to go and take a hand at cribbage with a friend, and afterwards discuss a cold sirloin of beef, and throw out a few lackadaisical remarks, in a way to please myself, but it would not do long.”

   “"Then let those who do know it learn that you are able to bear such wounds without outward complaint. I tell you fairly that I cannot sympathize with a lackadaisical lover."”

   “I could hear the sound of the janitor's lackadaisical scrubbing against the wooden floor.”

2. Lazy; slothful; indolent.