Someone who has lost their FREAKIN' mind.

Some examples are Sherri, Joanie, Ashley, Tammy, Amanda
Whoa Nelly! Did you overhear their conversation this morning....Those girls are Bat-shit crazy!

I wonder what's wrong with those girls? They seem to have gone bat-shit crazy.
by Demands James December 30, 2016
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Acting in an obviously crazy manner, psychotic, disconnected from reality
Who is she talking to? There is no one there.-She's bird-shit crazy.
by lilgirl4 January 29, 2009
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The highest level of crazy, which causes people to outrageous things that automatically attract media attention.
Why is Britney wearing her wedding dress in public?
She's bat-shit crazy.
by AJV22044 January 17, 2008
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Slang term to describe a person who has gone crazy, often to describe a tweaker.
My friend was tweaking and then he went bat-shit crazy and started talking to the walls about pink elephants.
by Bottom Twink January 22, 2016
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When a person gets so mad that they are about to start throwing shit, like apes do.
you: Did you hear that Rachel cheated on Greg?
me: Yeah, he went all ape shit crazy.
you: i though he was about to start throwing shit, like the angry monkeys at the zoo.
by {NH} March 7, 2011
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Used to define extreme mental maladies.

More emphatic version of batshit crazy
Hey, Britney Spears has gone batshit crazy.

No, she's more like Pterodactyl shit crazy.
by Cazboab December 12, 2010
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