Also known as "The Fake It Till You Make It" technique, this is when you tell your family and friends you're "working on a big project" while actually playing 50 hours of video games. It's all about confidence, people! If you exude a certain level of "productivity" energy, you'll get away with it. Read about Technique 4 - The Art of Multitasking
Example: "I'm just, uh, researching... for my... paper. Yeah, that's it. A paper. On, uh, video games." See more examples of this technique in action