A slang verb, to screenscrape.
Screenscraping is a way of extracting data from a web page. It's based on parsing the HTML code of the page and extracting the required data using string parsing.
See wikipedia - http://en.wikipedia.org/wiki/Screenscraping
This technique is often used for mashups (see wikipedia http://en.wikipedia.org/wiki/Mashup_%28web_application_hybrid%29 ).
See also web scraping