A manager who comes in, makes a lot of noise, flaps about, eats all the sandwiches and flies out, leaving s**t everywhere.
See also HitAndRunManagement?
I read about a consultant who actually used the title "Corporate Seagull" on his business card.
That's incredible. That's actually as Dilbertesque as when RatBert?, while consulting, demonstrated he could earn $70 by wiggling his furry behind for five minutes. (Please: reference? Explanation?)
He explained that he had described what he did for a living when someone said "So you are a corporate seagull?". I don't think he got the joke, but he liked the expression...
Also see ManagementByDriveByShooting.