TL;DR. TL;DR, short for too long; didn't read, is Internet slang to say that some text being replied to has been ignored because of its length. It is also used as a signifier for a summary of an online post or news article. The phrase dates back to at least 2003, and was added to the Oxford Dictionaries Online in 2013.
Ugg boots (sometimes called uggs) are a unisex style of sheepskin boot originating in Australia and New Zealand. The boots are typically made of twin-faced sheepskin with fleece on the inside, a tanned outer surface and a synthetic sole. The term, ugg boots, originated from Australia, initially for utilitarian footwear worn for warmth, and which were often worn by surfers during the 1960s. In the 1970s, the boots were introduced to the surf culture of the United Kingdom and the United States.
Still, UGG Australia, which began in California in 1978 as Ugg Imports, has managed to dominate the market and become a billion-dollar brand for its parent company, Deckers. The company now sells everything from handbags to men's loungewear under the UGG brand, though its core products remain the boots and slippers. Connie Rishwain, president of UGG Australia, told HuffPost that its top-selling boot remains the Women's Classic Short boot, which retails for $155. The prime reason for the boots' staying power is that there is no match for the comfort and warmth that they deliver, according to Rishwain.