BOG (from Ir. and Gael. bogach, bog, soft)  , a tract of soft, spongy, water-logged ground, composed of vegetation, chiefly mosses, in various stages of decomposition . This vegetable matter when partially decomposed forms the substance known as " peat " (q.v.) . When the accumulation of water is rapidly increased by excessive rainfall, there is a danger of a " bog-slide," or " bog-burst," which may obliterate the neighbouring cultivated land with a deposit of the contents of the bog . Destructive bog-slides have occurred in Ireland, such as that of the Knocknageeha Bog, Rathmore, Kerry, in 1896, at Castlerea, Roscommon, 1901, and at Kilmore, Galway, 1909 . There is a French game of cards called " bog," said to be of Italian origin, played with a piquet pack on a table with six divisions, one of which is known by the name of the game and forms the pool . It was fashionable during the Second Empire .