1. The cheapest of all deals available on the internet.
2. The slickdeal becomes an obsession from which you purchase many useless items for no apparent reason, leaving your apartment/house/tenement cluttered with really really cheap stuff.
3. A slickdeal can also be a free item, a stolen item, or a price mistake. If any of these slickdeals become available, the true slickdealer will try and get as many of the item until said item is out of stock.
(v): To purchase something at a really cheap price; to get free samples or any free good or service; to steal something, thus getting the slickest of all slickdeals.
(n): Chang, you're never going to guess the slickdeal I got today!
(v): Holy Crap Walter, I can't believe you managed to slickdeal all of those free Dr. Peppers!