WordWeb Online

1. Person who does no work
   - idler, loafer, do-nothing [informal], layabout [informal], bum [N. Amer, informal], shirker [informal], deadbeat [informal]
    
2. [US, informal] (military) a person who shirks his work or duty (especially one who tries to evade military service in wartime)
   - shirker

1. Not tense or taut
   "slack and wrinkled skin"; "slack sails"; "a slack rope";
   - loose
    
2. Flowing with little speed as e.g. at the turning of the tide
   "slack water"
    
3. Lacking in rigour or strictness
   "slack in maintaining discipline";
   - lax

Derived forms: slackers

See also: lax, negligent, standing

Type of: nonworker

Encyclopedia: Slacker