on (one's) back

(redirected from on his back)

on (one's) back

Constantly nagging one about something. Ugh, my mom is on my back all the time about my grades, but I just have no interest in the classes I'm taking this semester.
See also: back, on

on your back

in bed recovering from an injury or illness.
See also: back, on

on (someone's) back

Persistently nagging or urging someone to do something.
See also: back, on