The phrase “sprung on you” typically means to be surprised or caught off guard by something unexpected. It can refer to a situation where someone is confronted with an unanticipated event, information, or demand. For example, if a friend suddenly tells you they are moving away without any prior indication, you might say that the news was “sprung on you.”
The phrase can convey a sense of shock or suddenness, often implying that the person affected did not have time to prepare for or react to the situation adequately. It can be used in various contexts, such as personal relationships, work situations, or general life events.