jib(noun, verb) noun1. any triangular fore-and-aft sail (set forward of the foremast)Definition categories: man–made verb1. refuse to complySimilar word(s): balk, baulk, resistDefinition categories: social, disobey2. shift from one side of the ship to the other- The sail jibbed wildlySimilar word(s): gybe, jibeDefinition categories: motion, sail