snuff

1 snuff /ˈsnʌf/ verb
snuffs; snuffed; snuffing
1 snuff
/ˈsnʌf/
verb
snuffs; snuffed; snuffing
Britannica Dictionary definition of SNUFF
[+ object]
1 
: to cause (something, such as a candle or cigarette) to stop burning by pressing it with your fingers, covering it, etc.
— often + out
2 
informal
a  : to cause the end of (something)
— often + out
b  : to kill (someone) — often + out

snuff it

British, informal
2 snuff /ˈsnʌf/ noun
2 snuff
/ˈsnʌf/
noun
Britannica Dictionary definition of SNUFF
[noncount]
: a type of tobacco that is chewed, placed against the gums, or inhaled into the nose

up to snuff

US, informal
: good enough : as good as expected or wanted