Back in 1992 or so, in a desperate effort to convey to prospective employers just what it is I do well, I came up with the term "Air-drop Programming". The idea is you get parachuted into the middle of a code base, then fight your way out until the problems are fixed. It implies a total effort at dealing with the unfamiliar, without timidity. It really describes much of the maintenance programming experience, just not as boring.
I haven't been shy about using the term, but it never really caught on. I used it recently at OOPSLA and it looks like it was noticed! And some othe bloggers have picked it up as well Cool!