Citations:bat-crap

Adjective: "alternative spelling of batcrap"

 * 2006 — Joshilyn Jackson, Between, Georgia, Center Point Publishing (2006), ISBN 9781585478668, page 222:
 * "Glad to see you're getting out. I know Genny's probably driven you bat-crap."

Adverb: "alternative spelling of batcrap"

 * 2008 — March 17, Chuck Lorre, Lee Aronsohn & Dave Goetsch, "The Cooper-Hofstadter Polarization", episode 9-1 of The Big Bang Theory, 00:07:55-00:07:58:
 * Leonard Hofstadter : Not to mention, Sheldon is bat-crap crazy.


 * 2010 — Kate Brian, Vanished, Book 13, Simon & Schuster (2008), ISBN 9781416984719, page 15:
 * … and of all the people we'd trusted who'd turned out to be completely bat-crap crazy.
 * 2010 — Joshilyn Jackson, Backseat Saints, Grand Central Publishing (2011), ISBN 9780446569170, unnumbered page:
 * Her mama bounced in and out of the nuthouse, and a bat-crap crazy mother seemed a flat step down, even from a willfully missing mother like my own.