a situation in which you can run a search for a specific phrase that returns a result that has been manipulated by web authors to return a particular page at the top of the rankings
a trick used to manipulate the results yielded by a search in Google or any other search engine
A recent practive which involves setting up multiple sites which link to a single website with the sole purpose of increasing Google ranking or manipulating Google's search results. Often favoured entertainment for Bloggers.
Google bombing is a method of catapulting a website - often a weblog - to the top of a Google search for a given phrase, achieved by abusing a loophole in the search engine's algorithm. Because Google will often recommend sites which do not contain the exact phrase you are looking for, but have been linked to by sites that use that phrase, website owners found they could create pages full of links to their site, often using bizzarre and irrelevant keywords, to bring their sites to the top of certain searches.
A Google bomb (also referred to as a 'link bomb') is Internet slang for a certain kind of attempt to influence the ranking of a given page in results returned by the Google search engine, often with humorous or political intentions. (Note: payment required, weblink goes to abstract.) Because of the way that Google's algorithm works, a page will be ranked higher if the sites that link to that page use consistent anchor text.