Slacker
（重定向自Slugabed）
A slacker is a person who habitually avoids work or lacks work ethic.
According to different sources, the term slacker dates back to about 1790 or 1898. It gained some recognition during the British Gezira Scheme in the early to mid 20th century, when Sudanese labourers protested their relative powerlessness by working lethargically, a form of protest known as "slacking".