high-riding
/ˌhʌɪˈrʌɪdɪŋ/adjective
1That rides or travels high in the sky, water, etc.
2Of a (motor) vehicle: that sits high off the ground; that is a high rider.
3Arrogant; overbearing, superior. Compare to mount (also ride) the high horse.
4Successful; high-flying. Compare to ride high.
Origin
Mid 18th century. From high + either riding or riding, present participle of ride.