"Pop ups" refers to small windows that suddenly appear on a computer screen, usually while browsing the internet. They can display advertisements, notifications, or other information. Full definition
Looking at this discussion, the only question that keeps on popping up in my head is why do all these commentators really care about how other people live their lives. (religion.blogs.cnn.com)
Remember when live, updated advertisements started popping up on in - game billboards? (pixeljudge.com)
This seems to be the latest superfood that I see popping up all over the place and this one is for good reason! (holisticfoodie.com)