The Collaborative International Dictionary of English v.0.48:

Lounger \Loun"ger\, n.
   One who lounges; an idler.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lounger
    n 1: someone who wastes time [syn: dallier, dillydallier,
         dilly-dallier, mope, lounger]
    2: an armchair whose back can be lowered and foot can be raised
       to allow the sitter to recline in it [syn: recliner,
       reclining chair, lounger]
    3: an article of clothing designed for comfort and leisure wear