1 definition by ed molloy
Jack apple was the term used by British sailors in the 1800s for the apples that were kept on the ship that were kept fresh by floating in a barrel of rum. The sailors would eat the apples, and if they ate more than one a day, they would become "jack appled." As it moved onto modern times, a jack apple became slang for a dottering fool.
"You're such a jack apple!"
by ed molloy October 10, 2004