Sic bo (Chinese: 骰寶), also known as tai sai (大細), dai siu (大小), big and small or hi-lo, is an unequal game of chance of ancient Chinese origin played with three dice. Grand hazard and chuck-a-luck are variants, both of English origin. The literal meaning of sic bo is "precious dice", while dai siu and dai sai mean "big [or] small".
Sic Bo is a casino game, popular in Asia and widely played (as dai siu) in casinos in Macau, Hong Kong. It is played in the Philippines as hi-lo. It was introduced to the United States by Chinese immigrants in the early 20th century, and can now be found in most American casinos. Since 2002, it has been played legally in licensed casinos in the United Kingdom.
Gameplay involves betting that a certain condition (e.g. that all three dice will roll the same) will be satisfied by a roll of the dice.