To be spamdexed means to have violated the search engine guidelines, usually Google's, and be punished for it by being removed from the search engine or losing all visibility.

or to be spamdexed on spamdexed.com, to be reported as a violator of the search engine guidelines, usually Google's, in order to show up at the top of the search engine pages.

When you eat dirt for the first time and leave your family to build a shack in the woods