The phrasal verb "pop in" is primarily used in informal speech and writing. It is generally employed to describe a short, often unplanned visit to a place, such as "I thought I'd pop in for a quick visit." It conveys a sense of spontaneity and brevity and is most commonly used in casual settings, particularly among friends or acquaintances discussing social plans. While it could be used in a relaxed professional context, "pop in" is not typically found in formal writing or business communication, where words like "visit" or "stop by" might be more appropriate. Additionally, "pop in" is versatile and can also refer to quickly entering or inserting something, such as "pop in a DVD." Its informal nature makes it an excellent choice for casual conversations and messages.
B1
PreIntermediate
1. To visit a place or person briefly, often informally or without an appointment.
I'll pop in to see you after lunch.
She decided to pop in at the cafe for a quick coffee.