A person whom lacks so much common sense and/or a combination of basic intelligence that they can be compared to an orifice of female genitalia filled with a numbing agent
My sister in law is such a fucking dipshit, she is numbah’ than a cunt full of Novacaine .
Did you hear what Becky did? Oh my god, she is numbah’ than a cunt full of novacaine
1. a felt of sheepskin pad placed between a horse's back and the saddle to prevent chafing
2. a word used in the 2008 Spelling Bee which was confused with "numnut".