upstager

/ʌpˈsteɪdʒər/
noun
  1. A person who draws attention away from others, especially in a performance or social setting.
    • She was known as an upstager who always stole the spotlight at parties.
    • The comedian was an upstager, making the other performers look dull.
    • He didn't mean to be an upstager, but his loud laugh always got attention.
What does "upstager" mean? | whatsthatwordmean | whatsthatwordmean