Tarnish.
It will lick you back.
Nothing happens when you lick lead. You are ingesting a small tiny amount.
Licking an outlet is not preferred. If you lick an outlet, there are chances that you may get shocked.
it will taste awesome
bubbles of Hydrogen gas is produced and it will slightly tarnish
it is extremely toxic, so do NOT do it.
Silver reacts with sulfur compounds in the air to form a black tarnish layer called silver sulfide. This tarnish layer can be easily wiped off with a polishing cloth or a chemical cleaner to restore the silver's shine.
If you leave silver out in the open air, it will eventually tarnish due to a chemical reaction with sulfur compounds in the environment. This tarnish can be removed through polishing. To prevent tarnishing, silver can be stored properly in airtight containers or with anti-tarnish materials.
You will die very fast and painful.
Depends on what kind of battery
you can get salmonella (do you mean raw meat?)