The Collaborative International Dictionary of English v.0.48:

Loll \Loll\ (l[o^]l), v. i. [imp. & p. p. Lolled (l[o^]ld); p.
   pr. & vb. n. Lolling.] [Cf. Icel. lolla to act lazily,
   loll, lolla, laziness, OD. lollen to sit over the fire, and
   E. lull. Cf. Lill, Lull.]
   1. To act lazily or indolently; to recline; to lean; to throw
      one's self down; to lie at ease; as, to loll around the
      house on a lazy summer day.
      [1913 Webster +PJC]

            Void of care, he lolls supine in state. --Dryden.
      [1913 Webster]

   2. To hand extended from the mouth, as the tongue of an ox or
      a log when heated with labor or exertion.
      [1913 Webster]

            The triple porter of the Stygian seat,
            With lolling tongue, lay fawning at thy feet.
                                                  --Dryden.
      [1913 Webster]

   3. To let the tongue hang from the mouth, as an ox, dog, or
      other animal, when heated by labor; as, the ox stood
      lolling in the furrow.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Loll \Loll\, v. t.
   To let hang from the mouth, as the tongue.
   [1913 Webster]

         Fierce tigers couched around and lolled their fawning
         tongues.                                 --Dryden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

loll
    v 1: hang loosely or laxly; "His tongue lolled" [syn: droop,
         loll]
    2: be lazy or idle; "Her son is just bumming around all day"
       [syn: bum, bum around, bum about, arse around, arse
       about, fuck off, loaf, frig around, waste one's
       time, lounge around, loll, loll around, lounge
       about]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "loll":
   bed, bed down, bum, bum around, couch, crawl, curl up, diddle,
   do nothing, droop, go to bed, go to rest, goof off, grovel,
   hang around, idle, lay, laze, lazy, lie, lie around, lie down,
   lie flat, lie limply, lie prone, lie prostrate, loaf, loiter,
   loiter about, loll around, lollop, lollop around, lop, lounge,
   lounge around, mooch around, moon, moon around, recline, repose,
   rest, settle to rest, sit around, slouch, slouch around, slump,
   snug down, sprawl, stand around, take it easy, take life easy,
   trollop