Board Thread:Eureka Moments/@comment-30699885-20161209065931/@comment-31542119-20170429063236

CBA is also known as Anagram mode. It's the mode where the names of the items are all jumbled and it always (and only) shows up after an anomaly has been dispelled at that location, either by playing it or using a dispeller tool.

I'm sure no one would laugh at you. Your question is a very reasonable one about a game specific term. :)