shoulder ride, carrying someone on your shoulders
パパ、肩車して。
Daddy, give me a ride on your shoulders.
セジュ肩車をしたことある？
Seju, have you ever given someone a piggyback ride?
— グエムル -漢江の怪物- (2006)
交代で肩車をしよう
Let's take turns giving each other piggyback rides.
— さらば、わが愛／覇王別姫 (1993)