A dickey (alternatively written as dickie or dicky; sometimes known in American English as a tuxedo front or tux front) is a type of false shirt-front - originally known as a detachable bosom - designed to be worn with a tuxedo or men's white tie, usually attached to the collar and then tucked into the waistcoat or cummerbund. Better dickeys have a trouser tab at the end to secure them down, preventing the dickey from popping out. The rigid plastic dickey came into fashion in the latter years of the 19th century, and was one of the first successful commercial applications of celluloid.