1. A person with an innate and often unintentional ability to ignore common sense
2. A person generally lacking foresight in suspicious or sketchy situations
1. (verb)By going to that party where everyone was getting high, despite the fact his freinds told him not too, and ending up passed out in the gutter the next day, he was so voni.
2. She totally pulled a voni by making out with that homeless old man who ended up giving her scabies.