That's been my experience as someone who tends to ask them regularly. I don't have a lot of hubris when it comes down to it, so I'll almost always ask. Especially acronyms or industry/insider business terms... I'll usually do a quick search in a browser, but if the results don't make sense, will simply ask.

Asking stupid questions almost goes hands in glove with "it's easier to ask forgiveness than permission." A lot of times, you're better off just doing something. Asking a simple question or making something happen saves a lot of grief more often than not. Understanding is important.