This term is a good synonym for 'miscreants'--and exclusively young ones.

The 'deil' part (also: 'deel') is 'devil'--in the way we might think of a young one as a 'little devil' (rascal).

The 'buckie' part is more interesting. A buckie is apparently another term for a whelk, which is in the Buccinidae family of sea snails.

Sir Walter Scott used the term. Is it a term in Scotland still?

that's a new one for me.

so, deel bookie (buckie pronounced like 'fool' or 'yuck'?) ?

is a guy who's fuller himself.

Oh wow, that's even a better pun than I thought it was when it popped into my head. It's a double!

"Not a word shall cross my lips till he's gone," persisted Mrs Catanach. "I know him too well! Awa' wi' ye, ye deil's buckie!" she continued, turning to Malcolm; "I ken mair aboot ye nor ye ken aboot yersel', an' deil hae't I ken o' guid to you or yours! But I s' gar ye lauch o' the wrang side o' your mou' yet, my man."

~George MacDonald, Malcolm, Chapter 43.