Michael Allen Muir (born March 14, 1963) is an American singer and songwriter who is the lead vocalist of Los Angeles-based bands Suicidal Tendencies, Los Cycos, and Infectious Grooves. He has also released several solo albums under his nickname "Cyco Miko". Muir's trademark is wearing bandanas, jerseys with the number 13, and hats with block-style letters that read "suicidal".