In addition to the various meanings and definitions of "woot" which have been described thoroughly above, woot has more recently come to represent the online shopping/deal website woot.com.
Woot.com is a "deal of the day" style online shopping website. Every day at 12:00am Central Standard Time the current item for sale is replaced with a different item for the remaining 24 hours.
Since its debut on July 12, 2004 Woot has grown significantly and has become somewhat of a cult favorite online shopping destination for geeks, and anyone else looking for a good deal on an interesting, useful, funny or otherwise quirky item.
In addition to the normal Woot sale, there are also sites for Shirt.woot, Wine.woot Sellout.woot and most recently Kids.woot. These sites rotate daily deals in the same way as the normal woot, except featuring shirts, wine, deals from Yahoo Shopping and kids products, respectively. Adding to the standard woot sales, Woot.com also features a "Woot-off" which happens every so often on the front page of the site and changes the item rotation into a sellout/timeout style in which the next item will go up for sale as soon as the previous item sells out.
Woot.com has therefore created another usage for the word Woot, itself: "Have you checked the woot?" or "What is today's woot" and various adaptations. Woot has now become a thing, in addition to a declaration, statement and other various uses.