simon says

/sˈaɪmən sˈɛz/

simon says

a game for children in which a player is considered as a leader and other players must do what the leader says only if they add “Simon says” at the beginning of their instructive sentences

Examples

1. I think they're playing Simon Says.

2. Oh! - Like Simon Says is usually like a very strong and powerful song

3. It's like when I'm in the reactor room doing Simon Says, and someone reports a body, and then you have to start all over after the discussion's over.