{v. phr.} To understand the motives of someone; not be deceived. * /Jack keeps telling us how wealthy his family is, but we are on to him./
BE ON TO
Meaning of BE ON TO in English
Dictionary of English idioms . Словарь английских идиом. 2012
{v. phr.} To understand the motives of someone; not be deceived. * /Jack keeps telling us how wealthy his family is, but we are on to him./
Dictionary of English idioms . Словарь английских идиом. 2012