noun. A precise, whackadoo-detecting instrument.
Related terms: batshit loony, batshit whacko, batshit insane, batshit nutty, batshit nutso, super-batshit-insane, completely-fucking-batshit-insane, batshit-fucking-crazy, batshit-sounding, non-batshit, pre-batshit, anti-batshit, batshittery, holy batshit, batcrap, batpoop.
Real citation: "I can only imagine the very first TV commercial. Here’s an excerpt with Hogan loaded on about 5 cans of his own product, and the Batshitometer at about 35:"
(Gary Ashley, March 9, 2006, http://behindthemayhem.blogspot.com/2006/05/celebrity-drink-madness.html)
Made-up citation: "A batshitometer in my family tree would go off like a metal detector in a robot factory. Boing boing boing boing!"