As soon as he starts hovering acknowledge him with, "I am very busy so send me an email with your issue and I'll get it in the queue." then go right back to work.Work gripe:
I have a co-worker that likes to walk up to my desk and stand there, regardless of how busy I am, until I attend to his question. I can be on the phone, typing frantically, and rifling through papers. He just stands there and stares.
Like most people, some issues of mine require time and attention and aren't necessarily resolved quickly. Regardless, he'll stand there and just stare at me while I'm trying to get a situation handled, taking zero social cues that I'm really busy at the moment.
Realizing that he's not going to go anywhere and getting tired of him staring and mouth-breathing, I'll look up at him to acknowledge his presence with a clear "go ahead but please be quick" look when I address him. Instead of trying to be succinct, he has to stammer around, say "I've got a question for you" followed by "I might know the answer to it" or "I'm not sure if you know the answer" or some other hem-hawing Hugh Grant in a 90's rom-com ramble before I have to interject with a much more stern "What do you need" to jar the broken record and get him back on track.
He's a nice guy and I've been able to keep my composure, but it's grating on me. And it's not like he doesn't DM or E-mail me and get quick responses.
I've always been taught that violence is not the answer, but I feel like it could still be very satisfying.
It drives me crazy when I wait my turn at a business or other place and then the phone rings and the person on the phone is suddenly first in line. Put them on hold and help me since I have been patiently waiting for my turn.