"Bug bash" is a term used in software development to describe a focused period of time where a team comes together to find and fix as many bugs or errors as possible in a software or application before its release. Full definition
Along with releasing a new Windows 10 Insider Preview Build 15007, Microsoft also announced the second Bug Bash for Windows 10 Creators Update. (windowslatest.com)
haha no more big features for Fall Creators Update in bug bashing mode. (windowslatest.com)
For those who participated in last Bug Bash in April — thank you. (blogs.windows.com)