To move slowly, often swaying somewhat from side to side, with no sense of urgency or purpose whatsoever.
Needs to be added as an adjective to a verb of motion, such as walk, amble, going etc.
However a person can also be described as ling-di-long. (See examples below)
Look at Roger walking ling-di-long to school! If he doesn't hurry up, he will be late, the idle toad!
Will you get a move on before you miss the bus, Miss Ling-di-long?