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.); very
Examples (2 in total)
俺たちはただおにごっこをしてただけだよ。
We were just playing tag.
トムとメアリーとジョンは、運動場でおにごっこをして遊んでいた。
Tom, Mary and John were playing tag on the playground.