To get rid of; to remove. Most commonly used in the restaurant industry today. It's origin shows it was commonly used in the late
1800's and was a contraction for "take 'em 8 miles out and plant 'em
6 feet deep". It was basically a request(order) to have some removed from
the face of the earth. In restaurants it means to take an item off the menu or available food list because they have run out (or are having issues with) an item or to quit service or allow entry to an individual.
"
86'd the
Halibut we ran out." "86'd the tattooed bozo at table 3 'cuz he's an ass" "
86 Alex cuz he didn't
pay back the loan by Thursday"