The act of performing an utterly meaningless task given to you solely to keep you out of the way. The name comes from an episode of The Simpsons in which Homer, and two others, are tasked with guarding a bee in a jar in the plant's basement while the Nuclear Regulatory Inspector is visiting.
Bernie: Duh, why are we down here?
Homer: Aw, geez. I told you Bernie, guarding the bee!
Bernie: But WHY?!
Homer: Aw, you guys are pathetic. No wonder Smithers made me head bee-guy.