Posted by Brian from Shawnee on November 15, 2007
In Reply to: Bat crap crazy posted by Mark Sanders on November 15, 2007
: Where does the phrase "bat crap crazy" come from?
That's a slightly sanitized version of "bat shit crazy", which was discussed about a year ago. If youo type "bat shit" (with quotes) in the search box, you'll find the discussion.
Basically, the "bats" part comes from "bats in the belfry" or "batty", and "shit" was added for emphasis.