1 definition by Shanbuh

Top Definition
When someone has crossed into extreme insanity.
Person #1:HEY GUYS LETS GO JUMP OFF A CLIFF AND WOOOO I JUST SHIT MYSELF!! -insane laughter-

Person #2: That kid is Batshit Insane.
by Shanbuh August 03, 2006

Mug icon
Buy a batshit insane mug!