The bad marinated jogre bones are a quest item that may be encountered during Tai Bwo Wannai Trio. They are created by cooking the incorrect type of pasty jogre bones on a range. They have no use in the quest.
Instead, burnt raw pasty jogre bones should be prepared, which can be cooked to create good marinated jogre bones. These can then be given to Tinsay to continue the quest.
The bones can also be buried or burned with a tinderbox. Marinated jogre bones give 18 Prayer experience each.