Know someone who's been naughty? Irish COAL for Christmas! (includes shipping)
Glynn Bros. is only sending Irish Coal in this case. (Bord Na Mona Briquettes bricks/pieces and Sods pieces from the Bogs. (1 or 2 depending on size. Sizes vary).
A lump of coal in a stocking is the universal sign for a child being punished. ... In 16th century Holland, children would put their clogs (this was before stockings) by their fireplace before Christmas. Good children would wake to find their clogs filled with cookies or candy, while bad children found coal.