Definition of "noonchine"

The ordinary breakfast of farm-servants is bread and skimmed-milk, with the remainder of what bacon was left the day before: their lunch or noonchine, consists of bread and cheese, with the small beer they take in their kegs to the field.

1810, Charles Vancouver, “Rural Economy”, in General View of the Agriculture of Hampshire, Including the Isle of Wight. Drawn Up for the Board of Agriculture and Internal Improvement., London: […] for Richard Phillips, […] by B. McMillan, […], section II (Servants), page 383

“Yes---I left London this morning at eight o’clock, and the only ten minutes I have spent out of my chaise since that time, procured me a noonchine at Marlborough.”

1811, [Jane Austen], chapter VIII, in Sense and Sensibility […], volume III, London: […] C[harles] Roworth, […], and published by T[homas] Egerton, […], page 151

Sit down, Mr. Felix, and take your bit of noonchine.

1872, [Charlotte Mary Yonge], “The Pillars of the House; or, Under Wode, Under Rode. Chapter XXV. Don or Mynheer?”, in [Charlotte Mary Yonge], editor, The Monthly Packet of Evening Readings for Members of the English Church, volume XIII, London: John and Charles Mozley, […]; Oxford: James Parker and Co., page 244