n KDE-speak a "servicemenu" is a special entry that appears in Konqueror's context menu depending on the file(s) that are selected. You may have seen them in action without even knowing it. For instance, if you have the KDE file archive utility "ark" installed you will see a menu entry to "Extract here..." whenever you right click on a tarball or zip file. The option to "Extract here..." is a servicemenu.