Eighty-Six (v.)

What does the idiom “Eighty-Six (v.)” mean?

Definition:

1) Discard, eliminate. 2) Throw someone out of a bar or store.

For example:

“1) Our boss approved raises for next year, but the district manager eighty-sixed them. 2) That guy has had too much to drink, and he’s causing trouble. Eighty-six him.”