knock off /(?)/

knock off

n.
  1. a device in a knitting machine to remove loops from the needles.

knock off

v. i. & t.
  1. to quit (working).
  2. to accomplish; -- frequently used when the task is accomplished rapidly.
  3. to kill; to defeat (opponents). [Colloq.]
  4. to discount, to deduct (a sum from a price).
  5. to rob.
  6. to make a knockoff of; to copy or imitate, usually without permission or admission of copying.