What does 86 stand for?

[SocialDemocrat61]

8. According the an online dictionary

eighty-six
verb

informal
a
: to refuse to serve (a customer)
"Beer here, barkeep," he said. "You're eighty-sixed," Lucy said. "Cut off. No more for you."
—Mary Karr
b
: to eject or ban (a customer)
The club's bouncers eighty-sixed her.
I nodded at the corner bar beside us. He said, "I can't go in there." "Why?" "I'm eighty-sixed."
—Andre Dubus
broadly : to eject, dismiss, or remove (someone)
He was eighty-sixed from Twitter following outrage from other users …
—Jason Wilson
The prof and his lovely wife … are ghosts, having recently been eighty-sixed from this world when their car was hit by a falling rock.
—John Stark
But [Jim] Boylen is yesterday's news now, kicked to the curb, eighty-sixed by the Bulls on Friday …
—Steve Greenberg
https://www.merriam-webster.com/dictionary/86