snuff out

1. Also, snuff it . Die or be killed, as in He looked very ill indeed, as though he might snuff out any day , or Grandpa just snuffed it . [ Slang ; second half of 1800s]

2. Extinguish, put a sudden end to, as in Three young lives were snuffed out in that automobile accident . This usage alludes to snuff in the sense of “put out a candle by pinching the wick,” an area itself called snuff from the late 1300s on. [Mid-1800s]

3. Kill, murder, as in If he told the police, the gang would snuff him out . [ Slang ; first half of 1900s]