Depends on the use. if "she was blunt" then it means straightforward and to the point.
if " the object is blunt" then it's dull with no point or not sharp
I'm not 100% sure what it exactly means, but I do know it is a simile.
Hope this helps! :)
Answer:
Yahoo!'s mobile team didn't have an executive champion to protect and nurture the team during the pioneering phase when financial results couldn't be realized. It couldn't show substantial results, so managers were reassigned. This is an example of: Creosote bush effect