From a Bud Light commercial.
An appearance of being in early and late to leave work, by placing an object on your desk that makes it appear you are there.
For example, when you sneak out of work early, but leave your laptop on on your desk and overnight. It looks like you stayed late and were in meetings all day, and the following day you came in nice and early.
Golf at 3:30 on a Tuesday? My boss is been riding my ass all week, I'd better leave a steaming cup of coffee on my desk. I'll meet you guys at 3:15.