What is Butt Nutty?
1.
An action, often by crazy people, that consists of jumping, chasing after, or trying to capture an animal. The animal's typically a reptile or amphibian or usually lives in/around water like a Snake, Frog, Fish, etc... Popular around the Midwest, especially Missouri
Man: Dude I caught a fucking fish today man!
Man's Friend: you fuck wad anyone can catch a damn fish!
Man: No, I went Butt Nutty on that bitch and dove in after him
Man's Friend: no way...you're one crazy goon
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7. 
(v.i.) Out to lunch; not having it together; acting in a stupid way. Typically derogatory.
Derivation: ..