/ lɒl; NAmE lɑːl/ verb [ v + adv. / prep. ]
1.
to lie, sit or stand in a lazy, relaxed way :
He lolled back in his chair by the fire.
2.
( of your head, tongue, etc. ) to move or hang in a relaxed way :
My head lolled against his shoulder.
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WORD ORIGIN
late Middle English : probably symbolic of dangling.