ride是骑、驾驭的意思； high是高的意思。ride high连在一起，意思是“大获成功、得意洋洋”。

【例句】
Children laughed , some jump around at their parents , some ride high to learn the solemn paces to show his new sunday clothes.
孩子们笑吟吟地，跳跳蹦蹦地跟在父母身边，有的则得意洋洋地学着庄严的步子，显示自己一身过礼拜日的新装。

Throughout the 1990s, Starbuck's Coffee opened a new store every workday. It was riding high.
上个世纪九十年代，星巴克每天都有新店开张，获得了巨大的成功。