A ne’er-do-well (plural: ne’er-do-wells) is a lazy, irresponsible, or worthless person who fails to achieve success or act in a useful way. [1]

Definition and MeaningLiteral Origin: A contraction of "never-do-well" (someone who never does well or succeeds).Core Traits: Chronic idleness, lack of ambition, financial irresponsibility, or general ineffectualness.

Part of Speech: Noun or adjective

(http://www.autoadmit.com/thread.php?thread_id=5901573&forum_id=2#50122528)

https://en.wikipedia.org/wiki/Fl%C3%A2neur

A ne’er do well is more like Eliza Doolittle’s father in My Fair Lady.

(http://www.autoadmit.com/thread.php?thread_id=5901573&forum_id=2#50122533)

Flâneur derives from the Old Norse verb flana, "to wander with no purpose".[2]

The terms of flânerie date to the 16th or 17th century, denoting strolling, idling, often with the connotation of wasting time. But it was in the 19th century that a rich set of meanings and definitions surrounding the flâneur took shape.[3]

The flâneur was defined in 1872 in a long article in Pierre Larousse's Grand dictionnaire universel du XIXe siècle. It described the flâneur in ambivalent terms, equal parts curiosity and laziness, and presented a taxonomy of flânerie: flâneurs of the boulevards, of parks, of the arcades, of cafés; mindless flâneurs and intelligent ones.[4]

(http://www.autoadmit.com/thread.php?thread_id=5901573&forum_id=2#50122579)