1. playing while the cat is away; taking a break while the boss is out; doing what one wants when one is (finally) alone; (lit.) relaxing while the demon is out
ogre; demon; spirit of a deceased person; ogre-like person (i.e. fierce, relentless, merciless, etc.); it (in a game of tag, hide-and-seek, etc.); seeker; Chinese "ghost" constellation (one of the 28 mansions)