A ne`er-do-well is a rogue, vagrant or vagabond without means of support; a good-for-nothing louse. Ne`er-do-well may also refer to: ...
• (n.) A person who never does, or fares, well; a good for nothing.
Ne'er'-do-well` noun A person who never does, or fares, well; a good for nothing. « The idle and dissolute ne'er-do-wells of their communities.» Harper's Mag. 
an idle, worthless person; a person who is ineffectual, unsuccessful, or completely lacking in merit; good-for-nothing.