? perhaps blend of Scots bleber to babble (alteration of blabber) and skellum, rascal
1790 - Tam O' Shanter, A Tale, Robert Burns'
see Example below
From: Anthologia Hibernica:
Or Monthly Collections of Science, Belles-Lettres, and History.
Vol II., July 1793, Poetry
Tam O'Shanter. A Tale, Robert Burns