Meaning
To take credit for someone else’s idea, achievement, or planned announcement, or to upstage them just before their own moment of recognition.
It carries a stronger note of injustice than simply outshining someone — it implies something specific was taken or preempted, not just overshadowed in general.
Origin
The phrase comes from an unusually well-documented and specific incident in English theater history. The playwright and critic John Dennis invented a new method of simulating the sound of thunder for his 1709 tragedy “Appius and Virginia” at London’s Drury Lane theatre, using a device involving a mustard bowl or similar rattled apparatus. The play itself flopped and closed quickly, but soon afterward Dennis attended a production of “Macbeth” at the very same theatre and heard his own thunder-effect technique being used without his permission or credit. He is reported to have exclaimed, in a version of the story widely repeated since, something to the effect of “That is my thunder, by God! The villains will not play my play, but they steal my thunder!” Whatever the exact original wording, the anecdote gave English a uniquely concrete, traceable origin for what could otherwise have been an abstract metaphor about credit and attention.
Examples
She announced her engagement at my birthday party and totally stole my thunder.
He always tries to steal his coworkers’ thunder by presenting their ideas as his own.
Don’t steal his thunder, let him tell everyone the good news himself.
A: They found out before the official announcement. B: Yeah, someone really stole the team’s thunder.
Frequently asked questions
What does 'Steal someone's thunder' mean?
To take credit for someone else’s idea, achievement, or planned announcement, or to upstage them just before their own moment of recognition.
It carries a stronger note of injustice than simply outshining someone — it implies something specific was taken or preempted, not just overshadowed in general.