b.s.c.a - A loud shout used when someone is about to do something so s

A loud shout used when someone is about to do something so stupid it will go down in history

B. S. C. A.! He jumped into the pool wearing socks.

B. S. C. A.! She tried to negotiate with the lunch lady.

B. S. C. A.! He said he was going to be president by next week.