be/go on at someone idiom UK
一再催促（某人）;向（某人）唠叨
to complain to someone again and again about their behaviour or to ask them to do something
My parents are always on at us about having a baby. 我父母老是催我们要孩子。
She's been on at me to get my hair cut. 她唠叨着催我去理发。