Prolonging something intentionally, can be unnecessarily, or to delay the inevitable. Gum is the "chewing gum", and it alludes to the habit of stretching it between your fingers and teeth and then putting it back in your mouth. Although not common, it can be a euphemism of euphemism "throwing the rubber".
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
