Never, ever, ever call it “due dilly”. Under any circumstances.

My old man
Said “follow the van
But don't due dilly dally on the way”
Off went the deck with our slide packed in it,
I dialled in with me heart right in it.
But I dillied and dallied, dallied and dillied,
Skype playing up and don’t know where to roam.

Repeat ad lib.

See also