The horsemeat scandal has shown just how lackadaisical we are toward the content of processed food here.
She rejected that the idea it was lackadaisical policing that is responsible for such crimes.
The lackadaisical initial response of the police may have led to the loss of key evidence.
1768 (Sterne), from interjection lackadaisy "alas, alack" (1748), an alteration of lack-a-day (1690s), from alack the day (1590s). Hence, "given to crying 'lack-a-day,' vapidly sentimental." Sense probably altered by influence of lax. Related: Lackadaisically.