When browsing the Internet: To accidentally close a browser page you wanted open. Generally meaning you'll have to go back to Google and re-search the term over and figure out which link was the page you wanted. Happens often when you have multiple pages up and inadvertently close the one you wanted. Also applies to accidentally closing documents without saving them.
Hmm, let me close these other pages and go back to the Ferrari wallpaper site. Aw crap, I just splorked myself!