Some one who is so off the wall insane that they just do the dumbest, most immature, revolting things.
My Ex-Girfrend e-mailed my new girl trying to scare her off
She is bat shit crazy!
Being crazy to the point where you need help
"Dude did you see Assir?"
"Yeah! That dude's fucking bat shit crazy!"
adj. (slang): A combined state of mental agitation and physical volatility. It's use may provide warning that the individual it describes has lost all self-control and cannot be reasoned with. Can refer to either a chronic or temporary condition.
I wouldn't go in there if I were you, Dolores is bat-shit crazy .
A clinically insane person beyond the regular diagnosis given to them by a psychiatrist.
Family: "So, did he have a psychotic break? Or is he manic/depressive?"
Doctor: "No. I'm sorry. Your son is bat shit crazy."
Acting in a generally insane manner; Tom Cruise.
When Tom Cruise jumped on Oprah's couch, he proved he was bat-shit crazy.
Crazy to a degree bordering on complete insanity. The state in which one makes decisions which make the exact opposite of sense.
See also: bat-shit
Why did Erin cheat on you with that greaseball?
- Because she's bat-shit crazy.
One step beyond just plain crazy. It is usually a temporary thing...sparked by something unexpected, or just really awful.
As soon as he saw me humping his mom, he went bat-shit crazy.