Pop up means to appear out of no where. For example, when you haven't seen a person for awhile and they suddenly appear. Someone was missing and then they appeared again unexpectedly/surprisingly. Pop out means to come out of some enclosure or space.

"Pop up" means that the object is popping in a vertical motion, usually up. "Pop out" means that it can pop out of any direction, not just up.

pop up vs pop out Both 'pop up' and 'pop out' are correct phrases, but they are used in different contexts. 'Pop up' is commonly used to describe something appearing suddenly or unexpectedly, like a message on a computer screen. On the other hand, 'pop out' is often used to describe something physically coming out of a container or space.

'Pop to' means go to a place quickly. 'Pop out' means you go out of the place you're in for a short amount of time. 'Pop in/into' means go inside a place for a short time. This is often used to mean go to someone's house.