informal, chiefly N. Amer. <非正式, 主北美>
a gesture of celebration or greeting in which two people slap each other's palms with their arms raised
（庆祝或问候的手势）举手击掌：
he grinned and gave him a high five.
他咧嘴一笑, 和他举手击掌致意。
(high-five)with obj.
greet with such a gesture
举手击掌致意。