[knock off] vi (1649): to stop doing something ~ vt 1: to do hurriedly or routinely "knocked off one painting after another"
2: discontinue, stop "knocked off work at five"
3: deduct "knocked off a little to make the price more attractive"
4. a: kill "knocked off two men ... on mercenary grounds --Lewis Baker" b: overcome, defeat "knocked off each center of rebellion"
5: rob "knocked off a couple of banks"
6: to make a knockoff of: copy, imitate "knocks off popular dress designs"