Mini-Centennial

I just uploaded the 100th joke to the Ioci Antiqui page — actually two versions of the same joke, by Lucilius (or Lucillius) in Greek and Martial in Latin. Like today’s Greek joke, tomorrow’s joke, from a prose author not yet quoted here, will feature a pun on the adjective oiktrós. Can anyone guess which joke I mean? I once posted it on another site, if that helps.