When you get to where you were intending to go, you forget why you were going there in the first place. Not to be confused with being stoned, destinesia often occurs during working hours, and is the cause of much frustration.
John ran down the stairs to the dry storage and walk-in, but when he got there he couldn't remember what he needed. Consequently, he had to run back upstairs to the kitchen, and look at his prep list again. Damn you, destinesia!
Logging into your e-mail account specifically to send an important message, then forgetting to send the message before you log out.
I had to send an e-mail letting my boss know that the meeting had been changed, but after I checked all my new messages my destinesia kicked in, and I logged out without sending the information to her.
The act of spawning a new web browser window or tab and immediately forgetting where it is you were going to go, thus instilling a sense of panic as you know it was something very important you needed to do.
Similar to "GLB" (Getting Lost Behavior) or "cerebral originitis".
I'm staring at my home page again due to my destinesia, but can't bring myself to close the window.