lackadaisical
US /ˌlæk.əˈdeɪ.zɪ.kəl/
UK /ˌlæk.əˈdeɪ.zɪ.kəl/
1.
lacking enthusiasm and determination; carelessly lazy
:
•
His lackadaisical attitude towards his studies resulted in poor grades.
•
The team's lackadaisical performance cost them the game.