What year did the mormons start necrodunking?

1840.

That's a really creepy way of describing it!!

I did baptisms for the dead when I was a member. It's thankfully not actually creepy, just involves a lot of waiting around for hours followed by half an hour of being splashed in the water a couple of dozen times.

Baptisms for the dead doesn't involve baptizing dead bodies, but rather it involves baptizing the deceased by proxy. For example when I was 12 years old, I was baptized for deceased people by proxy so that they could have the blessings of people who were baptized for themselves when they were on earth.

Umm... necrodunking?

From what I can discern from the gift of tongues... lol, not that I didn't need the gift of tongues for this. Anyways, from what I can tell, I think you are asking what year did we start baptizing vicariously for the dead. We do NOT baptize dead people. We baptize LIVING people in behalf of dead people.

We first started baptisms for the dead in temples in January, 1841:

https://www.lds.org/scriptures/dc-testament/dc/124... (scroll up to the top, at the chapter heading to see the date)

However, I believe it was done before that in rivers and lakes. I'm not sure when exactly it started but I will continue to do more research. It would obviously be sometime between 1830(When the Church of Jesus Christ of LDS was organized) and 1841

Edit:

Here we go:

"The first public affirmation of the ordinance of baptism for the dead in the Church was Joseph Smith's funeral sermon for Seymour Brunson in Nauvoo in August 1840."

Source: http://eom.byu.edu/index.php/Baptism_for_the_Dead

So, the answer to your question is August, 1840.

I don't think baptism for the dead was practiced until Nauvoo, so I agree with 1840 or thereabouts.

"Otherwise, what will those do who are baptized for the dead? If the dead are not raised at all, why then are they baptized for them?" 1 Cor. 15:29

You tell me, the World Wide Web is at your fingertips

"Necrodunking."

That's awesome. Did you come up with that yourself, or did you steal it from someone?