The definition of loiter is to hang around someplace without a reason to be there.
(Chiefly Brit., Informal) To act or talk foolishly
To spend time idly; loiter or lounge about; idle, dawdle, etc.
To move or act in a lazy, relaxed way; loll:
Find another word for mess-about. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for mess-about, like: lollygag, loiter, footle, loaf, lallygag, hang around, tarry, linger, lurk, mill-about and mill-around.