From a New York Times Q&A with Adam Ross Cole, a co-founder of BAM Architecture Studio in New York:
Q. What does BAM stand for?
A. That’s a good question. People have asked us that, and over the years we’ve tried to re-engineer it: maybe it stands for Better Architectural Methods. But it wasn’t where the name came from. We tend to do more complex, sophisticated projects, where there’s a lot of intricate thought required for the design aspect. So the idea was: Bam! What’s the big idea? So that’s where the name came from.
Hmm. I’d say that “Bam!” suggests the opposite of “complex, sophisticated projects” requiring “a lot of intricate thought.”