He blew tens of thousands on rocket gifts in one night.
Tips
culture
On Chinese livestream platforms (抖音, 快手, B站), 火箭 (rocket) is one of the most expensive virtual gifts - typically ~500 元 a pop. 刷 here means to send rapidly/in bulk. Top donors who 刷 the most rockets often get crowned 榜一大哥 'top-ranked big brother.'
usage
刷 is the all-purpose 'spam-send' verb in livestream/social-media contexts: 刷礼物 'spam gifts,' 刷弹幕 'spam danmu,' 刷评论 'spam comments.'
