spider food: n. Keywords embedded (usually invisibly) into a
web page to attract search engines (spiders). The intended result of
including spider food in one's web page is to insure that the page
appears high on the list of matching entries to a search engine
query. There are right and wrong ways to do this; the right way is
a discreet `meta keywords' tag, the wrong way is to embed many
repeats of a keyword in comments (and many search engines now detect
and ignore the latter).