Burma Robber is a term used to describe a type of criminal activity that originated in the country of Burma (now known as Myanmar). The term is derived from the four crossword solutions SIAM (4 letters), RANGOON (7 letters), and SIGNS (5 letters). SIAM is the former name of Thailand, RANGOON is the former name of Yangon, the largest city in Myanmar, and SIGNS refer to the symbols used by the robbers to mark their targets.