To send someone a link to a interesting article on a wiki or another such site with many interesting pages and many interconnecting links on those pages, so that they will be trapped in a maze of absorbing articles for hours on end.
Friend: Dammit, David Morgan-Mar posted a link to TV Tropes in today's webcomic's annotation and I spent the whole day reading useless trivia.
Me: You sir, have been wiki bombed.
Creating a Wikipedia article ostensibly to report about a narrow and perhaps unflattering topic, but really using it as a Google bomb, to make that topic show up near the top of related Google search results
"Clearly, when the article was first created in 2006, by someone calling themselves "Santorummm", it didn't just document Dan Savage's campaign against Rick Santorum. It was part of the campaign. Santorum wasn't just Google bombed. He was Wikibombed. And since Google affords such high rankings to Wikipedia articles, one played into the other." (The Register)