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Related to snuff it: snuff film
To die, break down, or become defunct. We all snuff it eventually, so we might as well enjoy the time we have. I drove that truck everywhere for 25 years, but it finally snuffed it completely yesterday.
ˈsnuff it(British English, slang, humorous) die: Old Jack was over 90 when he snuffed it.
tv. to die. The cat leapt straight up in the air and snuffed it.