be riding high

Meaning

1. to be successful or very confident

In the movies · 2

• In the tenth, riding high after his dazzling victory...Cinderella Man2005
• Just six months ago, Tuckersoft was riding high, with a string of hits topping the charts and mounting anticipation for their big Christmas release, Bandersnatch.Black Mirror: Bandersnatch2018

From the same entry

• be riding for a fall
• let ride
• ride the crest of
• ride herd on
• ride shotgun
• ride a wave of
• if wishes were horses, beggars would ride
• ride on
• ride out
• ride up
• come along for the ride
• have a rough easy ride