Completely insane. Related to the term "nuts" (meaning the same thing) in the same way that "apeshit" is related to "bananas" and "batshit" is related to "batty." It is unknown whether the offensive terms were dysphemisms of the innocuous terms or the innocuous terms euphemisms of the offensive terms. Excepting "apeshit," all of these terms (including "bananas") have the same meaning, that is, "crazy."
A syndrome resulting from a untreated squirrel bite. Symptoms include; the heightened urge to think & talk about squirrels, the increased desire to fetch nuts, and an intense feeling of a need to climb trees.
Person who thinks they are too good for certain down-home traditions, such as eating squirrel meat. Likewise, any person who considers themselves 'above' eating any type of offal or non-normal meat product.
"You won't eat squirrel meat? Dude, don't be such a squirrelitist."