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.
Understanding by Design, or UbD, is a tool utilized for educational planning focused on teaching for understanding advocated by Jay McTighe and Grant Wiggins in their Understanding by Design (1998), published by the Association for Supervision and Curriculum Development.he emphasis of UbD is on  backward design , the practice of looking at the outcomes in order to design curriculum units, performance assessments, and classroom instruction. Understanding by Design and UbD are registered trademarks of the Association for Supervision and Curriculum Development (ASCD).