Source : Webster's Revised Unabridged Dictionary (1913)

Loll \Loll\, v. t.
   To let hang from the mouth, as the tongue.

         Fierce tigers couched around and lolled their fawning
         tongues.                                 --Dryden.

Loll \Loll\, v. i. [imp. & p. p. {Lolled}; 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.

            Void of care, he lolls supine in state. --Dryden.

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

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

   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.

Source : WordNet®

loll
     v 1: hang loosely or laxly; "His tongue lolled" [syn: {droop}]
     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 around}, {lounge about}]