Yahoo Shortcuts automatically finds and underlines interesting items in articles and provides additional information via a pop up window (Yahoo Shortcuts also refers to shortcuts in Yahoo Search for common things like travel search). “People, places, organizations, and other things of interest are underlined,” says the FAQ.
One blogger is pointing out, though, that the tool may be going a little too far – by, for example, linking the term “underage girl” in a recent article about Ashley Dupre, the prostitute that led to the downfall of Eliot Spitzer. The Yahoo Shortcut helpfully links to a set of flickr pictures of underage women.
This is probably a term that you want to add to the blacklist, Yahoo.
Update: Per the comments below, Yahoo has removed the term from Shortcuts.