Steal Someone’s Thunder
Meaning: Someone “steals your thunder” when they use your ideas or inventions to their own advantage.
Origin: The term comes from the early 1700s when English playwright John Dennis invented a device that created the sound of thunder for a play he was working on. But, the play flopped.
Source: Giphy
Dennis noticed that another play was using his thunder device in the same theater. He angrily shouted, “That is my thunder, by God; the villains will play my thunder, but not my play!” The story rolled around London, and the idiom was born.