Affectedly pensive; languidly sentimental; dreamy.

Indolent; lazy; idle, especially in a dreamy manner.

idle or indolent especially in a dreamy way; "she was annoyingly lackadaisical and impractical"; "a...lackadaisical, spiritless young man-about-town"- P.G.Wodehouse

Lacking spirit or liveliness; lethargic; listless; languid.

lacking spirit or liveliness; "a lackadaisical attempt"; "a languid mood"; "a languid wave of the hand"; "a hot languorous afternoon"

Although often used as a synonym for "carefree" or "insouciant," this term is derived from "lackaday," as in "alas, the day." Proust-like, the lackadaisical person - crippled by nostalgia for times past - lacks the will to get out of bed. See: BLASÉ, ENNUI, OBLOMOV, SPLEEN.