thumbstopper

When you have posted something on the internet that makes people stop scrolling down the page so that they can pause to read it, then you have produced a thumbstopper.  Most people scroll down on their mobile phones using their thumbs and only stop the thumb action when they see something riveting.  Well, thumbstopping.  There is lots of advice on the internet about how to produce thumbstopper content that will guarantee a thumb stop.