The quickest way to get me to unfollow you; when a pregnant woman constantly posts about her pregnancy on Facebook.

Also a good indicator that the offending will likely become one of those moms who posts endless photos of her baby... and only endless photos of her baby after it is born.

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

A portmanteau of the words bump and update. On an internet forum, a bumpdate is a post made specifically to bump the topic up to the top of the list, and at the same time provide information of an update to the initial post.