1. lacking enthusiasm and determination; carelessly lazy

Examples

• His lackadaisical attitude toward his studies resulted in poor grades.
• The team’s lackadaisical performance disappointed their fans.
• She gave a lackadaisical wave goodbye without looking up from her phone.
• The restaurant’s lackadaisical service made customers wait over an hour for their food.
• His lackadaisical approach to the project showed he didn’t really care about the outcome.
• The security guard’s lackadaisical monitoring allowed several people to enter without badges.