MARCH 2025 DEFINITION OF 86 :
Eighty-six or 86 is American English slang used primarily in the United States Military and the hospitality industry.
The military usage refers to
taking a life or removing something
violently.
https://en.wikipedia.org/w/index.php?title=86_(term)&oldid=1283027752
MAY 2025 DEFINITION OF 86 :
Eighty-six or 86 is American English slang used primarily in the hospitality industry and
sometimes in the military.
In the hospitality industry, it is used to indicate that an item is no longer available, traditionally from a food or drinks establishment, or referring to a person or people who are not welcome on the premises. Its etymology is unknown, but the term seems to have been coined in the 1920s or 1930s.
Military personnel might use "86" informally to refer to
scrapping equipment (e.g., "That old radio got 86'd") or ending a plan or mission (e.g., "The op was 86'd due to bad weather").
https://en.wikipedia.org/wiki/86_(term)