A woman who is completely insane beyond the capacity of regular insanity, or craziness.
Glen Close in Fatal Attraction was a Bat Shit Crazy Bitch

Lorena Bobbitt was a Bat Shit Crazy Bitch.

Man 1- "That chick is gorgeous."

Man 2- "That's my buddy Dave's ex, she drove his own car through the front living room of his house. She's a Bat Shit Crazy Bitch."
by SardonicAnthony July 24, 2011
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-noun

-pronunciation: bat - shit - crazzee - bitch

1. a female who is just plain crazy. she pesters you even though ya'll have been broken up for months. this particular type of female wont show her true colors until it's to late. she knows she's crazy so she suppresses this side of her until you learn to trust her. she will tend to get mad over the littlest things. they are usually categorized with a succubus, and will drain you of all that once made you a man. she will do many things on impulse, especially like hurting you. If you know are in a relationship with one or know someone that is, GET (them) OUT NOW!
1. "Wow, bob's ex-wife is just a bat shit crazy bitch. She actually tried cutting off his dick when she found out about his lover."
by PrinceAlbert1488 July 31, 2011
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Slang terminology in Marine Corps boot camp in 1971 at MCRD San Diego. Used to express strong emotions or disagreement with someone else's comments or behavior.
As a recruit platoon begins to march but is out of step the D.I. shouts, " Bat shit and bull pussy, maggots. That is not how you march. Get on your knuckles. We'll p.t. until you get it right. " Physical training being knuckle pushups on the tarmac as disiplinary punishment.
by uncle sammy's misguided child December 12, 2009
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Crap teenage saying, used also by older bogans who think they're still young and cool. Just a term added on to a self explanatory insult for 'effect'.
That girl is dumb as batshit. She is boring as bat shit.
by Shoopittyboo May 1, 2016
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Crazy as fuck, outlandish and

perpetually unnecessarily rude and is always right rather then wrong when 99% of the time they’re wrong as fuck, annoying as fuck and won’t shut up
Hey you talked to Ryan lately?

You mean Mr. Bat-shit Donald Trump crazy?
Yep nailed it.
by mr.pseudonym November 19, 2020
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A type of crazy beyond normal crazy. More "out there", "in their own world" kimd of crazy.
She saw him with that woman, and she went "bat shit crazy" on his ass. Everything went downhill from there.
by KeepinItREAL89 June 13, 2018
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