A cross between a space cadet and a basket case. A sort of Ditzy meets ADHD. The person comes to you in a flurry of hyper/frenetic activity and hands off a task for you. They're in a major hurry to leave for something. Problem is that they forgot one or more key details that you need to be able to do your part.
Jill: God I wish he'd finish everything before he heads to happy hour.
Tim: What did he forget this time?
Jill: He didn't make the deposit. I can't process this without the money being there. God what a spaceket case.