BE ONTO

а. связаться с кем-л., особенно по телефону I've been onto the director, but he says he can't help. б. постоянно просить кого-л. о чем-л. She's been onto me to buy her a new coat for a year. в. открывать, обнаруживать что-л. Don't think I haven't been onto your little plan for some time. The police are onto us, we'd better hide.