"Was on to" is a colloquial expression that typically conveys the meaning of being aware of or understanding something, especially a deception, trick, or secret. The phrase is derived from the verb "to be on to" or "to be onto," which can be defined as recognizing or uncovering hidden or secretive behavior or intentions.
When someone is described as "was on to" a situation or a person, it implies a level of astuteness, perceptiveness, or suspicion on their part, indicating that they have become aware of or have started to suspect something that others may have overlooked or remained oblivious to.
The phrase often implies a sense of being one step ahead, having gained insight or knowledge that gives an individual an advantage over others involved or affected by the situation. It can also imply a sense of suspicion, suggesting doubt or a lack of trust in someone's motives or actions.
In some contexts, "was on to" can also imply that someone has discovered or is aware of a valuable or beneficial piece of information, idea, or opportunity.
Overall, "was on to" captures the notion of being alert, perceptive, and knowledgeable about a situation, whether it involves a secret, trickery, deception, or an advantageous opportunity.
