This is an old Scots and Northern English name for Halloween, the night of 31 October, otherwise called The Oracle of the Nuts. As the chill of autumn pervaded their homes, people would sit around their fires, eating newly harvested hazelnuts or chestnuts. Several fortune-telling customs grew up that involved throwing nuts into the fire, hence these names for the night.
A young man might give each nut the name of a possible sweetheart and watch to see which burned the brightest in the flames. This is evoked in John Gay’s poem, The Spell:
Two hazel-nuts I threw into the flame,
And to each nut I gave a sweetheart’s name:
This with the loudest bounce me sore amazed,
That in a flame of brightest colour blazed;
As blazed the nut, so may thy passion grow,
For ’twas thy nut that did so brightly glow!
Robert Burns recorded several related customs about this day, one of which was a fortune-telling game for a young couple in which two nuts were put in the fire. Their future was predicted depending on whether the nuts burned quietly together or jumped apart. An elaborated description appeared in an American publication of 1912, Games for Hallow-e’en, by Mary E. Blain: “A maid and youth each places a chestnut to roast on the fire, side by side. If one hisses and steams, it indicates a fretful temper in the owner of the chestnut; if both chestnuts equally misbehave it augurs strife. If one or both pop away, it means separation; but if both burn to ashes tranquilly side by side, a long life of undisturbed happiness will be their lot.”