From the same people who brought us "ask" as a noun comes a new idiom that I haven't heard of before: to "walk the wall."
I haven't heard this myself, but my sister (who is an IT consultant) asked me what it means, which means that I will likely be subjected to this very soon as well.
My speculative guess is that it means to try to get an idea of the scope of a problem by "walking" around it at a high level, but I have no idea as I haven't heard it in context.