( informal , disapproving ) to keep asking or telling sb sth so that they become annoyed or tired :
He was on at me again to lend him money.
( informal , disapproving ) to keep asking or telling sb sth so that they become annoyed or tired :
He was on at me again to lend him money.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005