Nemesis

At work, I am lucky enough to have several good friends and generally to get on with pretty much everyone else. However, I (like most of my chums here) have a nemesis. My nemesis is somebody who, on the whole, I like, but has a major flaw nonetheless. This person eats breakfast at their desk, a custom we mainly embrace wholeheartedly, but then deposits the bowl straight into the sink (beneath the haunted tap) with Fruit & Fibre still clinging in congealing chunks to its innards. And does not return to wash it up. Ever. Heinous!