A word usually used by one's band director to complain about a band's sound and attitude during a rehearsal. Usually used as one of the only big words the director can use.
That was a really lackadaisical attitude! Do not perform so lackadaisical! Dude lackadaisical is in our SAT test!
An awkward, useless word that only idiot english majors would try and sneak into a conversation. -- lack of spirit, inbetween happy and sad, indifference.
English Major Idiot: "Gracious be, I'm feeling so rather lackadaisical in this moment."
English Major Idiot's friend: "Dude.. .stfu! `smack` b!tch! just say yo ain't up to doin' sh!t u motha f**ka'. . . damn. I need some friend chicken. . . you f*ckin b!tch ass. . ."