present participle. When a nanny is treated like a longtime personal secretary, this word is apropos.
Real citation: "Elsewhere, WENN claims that Sienna Miller, who was dropped from George Hickenlooper's Edie Sedgwick biopic "Factory Girl" for not being enough of a name, has won the Edie role back now that the scandal surrounding her nanny-boinking boyfriend has at least temporarily given her a light dusting of fame."
(The IFC Blog, http://ifcblog.ifctv.com/ifc_blog/2005/08/incoming_new_di.html)
Made-up citation: "On the day nanny-boinking becomes an Olympic sport, the gods of Olympus will smile. So will nanny-boinkers, nanny-boinkees, and HBO."