"My old man said, foller the van,
And don't dilly-dally on the way
Off went the van with me old man in it,
I follered after with the old cock linnet,
But I dillied and I dallied,
I dallied and I dillied,
Lorst me way, and dont know where to go.
Oh you can't trust the Specials, like the old time coppers,
When you can't find your way home."

I think that in this case it just means not getting a move on.