подтирать нос (кому-то), заботиться о (ком-то) как о ребёнке
He always had to wipe his younger brother's nose when they were kids.
Ему всегда приходилось подтирать нос младшему брату, когда они были детьми.
Definitions
To clean or remove mucus from someone's nose, typically referring to helping a child or someone unable to do it themselves. It can also be used figuratively to mean humiliating or defeating someone decisively.
