Top Definition
A more polite, euphemistic, SFW way to describe someone who would otherwise be bat shit crazy
- Dude, so you ex threatened to break your necklace while you were sleeping?

- I know! I told you she was bat guano crazy!!!

- No wonder you dumped her, she IS bat guano crazy... just send her sorry ass to Arkham Asylum already!!!!
by el patron himself October 10, 2010

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