A project, activity or goal pursued as a personal favorite, rather than because it is generally accepted as necessary or important.

甲骨文创始人兼首席执行官拉里·埃里森因为创建了若干“宠物项目”(pet project。指因个人爱好而非大众需要而发起的项目)而闻名，如美洲杯帆船系列赛、购买马布里“亿万富翁的海滩”上的住宅、将夏威夷的拉奈岛变成一个生活实验室。