link condom
n.— «Well, now that we know the three major SE’s have teamed up with various programmers of blogs to use a “nofollow” tag for links, it didn’t take long before someone coined the term “link condom.”» —“Link Condom” by Brian Eitemiller Daily SEO Tips (Prescott Valley, Ariz.) Feb. 5, 2005. (source: Double-Tongued Dictionary)