Definition of jackass bark
1 : a 3-masted ship square-rigged on the foremast, setting square topsails and topgallant sails over a fore-and-aft mainsail, and fore-and-aft rigged on the mizzen
2 : a 4-masted ship square-rigged on the foremast and mainmast and gaff-rigged on the mizzen and jiggermast
3 : a sailing ship with three or more masts and a combination of gaffsails and square sails in addition to complete square rig on its foremast
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