Definitions for "Slacker"
Richard Linklater's movie Slacker may reference R.L. Stevenson's "Apology for Idlers," but Linklater himself admitted that it was a "kiss-off to a certain mindset - wallowing in negativity and being very alienated." Dr. Johnson, that great supporter of idleness, frowned upon those so-called idlers who "boast that they do nothing, and thank their stars that they have nothing to do," and who "exist in a state of unruffled stupidity, forgetting and forgotten; who have long ceased to live." Unlike the idler, in whom work and leisure have combined to become something fine, the slacker remains unhappily trapped in that dichotomy. See: DODGER, LEISURELY, FREE TIME, KILL TIME, SLACKNESS, VACATION.
a person who shirks their work or duty (especially one who tries to evade military service in wartime)
The term slacker was commonly used in the United States in World War I and World War II to describe men who were avoiding the military draft. But in the 90s it specifically referred to a variety of tendencies in the young generation—a use popularized by Richard Linklater's movie Slacker - subsequently spawning the label "slacker generation." A typical slacker is characterized by a static, unenthusiastic air manifesting in an apparent lack of effort.
Keywords:  weir, paddle, lock, door, flow
A paddle, or small door, used to control the flow of water through a lock or weir.