From Wikipedia
http://en.wikipedia.org/wiki/Woot,_Inc.#Woot-Off
Woot-Off
The site will occasionally deviate from the one-product-per-day model for a ?Woot-Off,? where a succession of products are available for a period of unannounced length, usually 24-72 hours. This mode is indicated by rotating lights and a bar indicating the usually unknowable amount of product remaining. The actual percentage of product remaining is also visible in the Woot-Off's HTML source code.
During a Woot-Off, each product is replaced by a new product within a few minutes after selling out, until the end of the Woot-Off, when a regular product is listed for the remainder of the day. Woot-Offs often feature items that did not sell out during regular Woot sales, often at lower prices than originally offered. New (unique) items are also interspersed throughout the Woot-Off, along with popular items like Bags of Crap and Mystery Brand speakers, presumably to maintain constant interest and surprise. On occasion, wine.woot! leftovers have also appeared.
Since the next item in the Woot-Off will not be listed till the current item is sold out, posters in Woot's forums occasionally use peer pressure to advocate the purchase of the current item. This selling of an item that few people actually want is called a "wootatrocity". Often members will boast of buying the current item just to advance the Woot-Off. It should be noted that during Woot-Offs, many forum members deviate from posting an honest critique of the product and instead pump the offering, hoping readers will quickly buy an inferior Woot and advance the Woot-Off to the next listing.
Many regard a Woot-Off as a day of rejoicing, due to the large quantities of inexpensive products available one right after the other. In the words of Matthew, of Woot! Podcast fame: "...it's like a non-stop party. It's like... it's like New Year's Eve meets the Rapture meets the flea markets at Shipshewana. It's like when Gilmore, Pat Conway, the Great Creatore, W.C. Handy and John Philip Sousa all came to town on the very same historic day, each bearing a different consumer electronics item or kitchen gadget priced to move. It's... da bomb."
[edit]
Bag of Crap
In lieu of typical product sales, Woot occasionally offers the ?Bag O? Crap? (or ?BOC?), a blind grab bag that includes dollar store items and can also randomly include more expensive electronics items. The BOC is marketed as one bag and shipping worth $5.00, and up to three "craps" costing $1.00 each. Orders are recommended purchased in quantities of three craps to minimize the percentage cost of shipping and maximize the probability of getting something of greater value. The "BOC" typically sells out within minutes of furious ordering.
Officially, the Bag of Crap is sold under the title of "Random Crap." Woot has also used the "Random Crap" moniker in more targeted sales, such as a random selection of desktop and wall calendars or NASCAR race scanners. Thus, a "true" Bag of Crap is only denoted by the presence of "Random Crap" in the product title without any other descriptive notation.
From Wikipedia
Since "BOCs" are often referenced in the Woot forums, Woot's forum software filters the text to spell out tongue-in-cheek phrases with the same initials, such as "Blinged-out cabbage", "Braille on Cookies", and others. A similar phenomenon occurs when a user types "refurb," which filters to "refurb (rox0rz!)," a nod to the controversial popularity of refurbished woots. In the past, the term "refurb" was changed to "Hurray! A refurb!" by the filter.