Screw-Off Meaning

(idiomatic, colloquial) Someone who often fails to do his or her work; someone known to goof off.

Example: 1997, Robert W. Snyder, Transit talk: New York's bus and subway workers tell their stories, page 137:
  You know, when a guy is a screw-off you got to discipline him.
1988, Ann Edwards Cannon, Cal Cameron by day, Spider-man by night, page 98:
  I've always considered that a polite way of telling a parent that her child is a screw-off, a goofball of major talent.