throw down
US /θroʊ daʊn/
UK /θroʊ daʊn/

1.
發起挑戰, 挑戰
to challenge someone to a fight or competition
:
•
He decided to throw down the gauntlet and challenge the champion.
他決定發起挑戰,挑戰冠軍。
•
The rival team threw down a challenge for a rematch.
對手隊發起了重賽的挑戰。