86 was coined as “get rid of” sometime in the 1920s or 1930s, it previously was used to indicate that an item was out of supply or stock and to 86 something was to make it disappear, it’s been used in media as slang used by gangsters planning to off someone
86 has always meant kill, although it can also refer to less harsh ways to get rid of something
Eighty-six is slang meaning “to throw out,” “to get rid of,” or “to refuse service to.” It comes from 1930s soda-counter slang meaning that an item was sold out. There is varying anecdotal evidence about why the term eighty-six was used, but the most common theory is that it is rhyming slang for nix.
Edit: dude edited the comment, it originally was an absolutely confident assertion that the term always meant kill.
Among the most recent senses adopted is a logical extension of the previous ones, with the meaning of “to kill.” We do not enter this sense, due to its relative recency and sparseness of use.
86 means kills
86 was coined as “get rid of” sometime in the 1920s or 1930s, it previously was used to indicate that an item was out of supply or stock and to 86 something was to make it disappear, it’s been used in media as slang used by gangsters planning to off someone
86 has always meant kill, although it can also refer to less harsh ways to get rid of something
https://www.merriam-webster.com/wordplay/eighty-six-meaning-origin
Edit: dude edited the comment, it originally was an absolutely confident assertion that the term always meant kill.
The paragraph right after reads:
You definitely have never worked in the service industry.