E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Skimble-Skamble.
Rambling, worthless. Skamble is merely a variety of scramble, hence scambling days, those days in Lent when no regular meals are provided, but each person scrambles or shifts for himself. Skimble is added to give force. (See REDUPLICATED WORDS.)