1. disparaging term, short for a fucking crazy/nutty person
2. disparaging term for someone who's had their nuts fucked, or likes to fuck nuts, either human or squirrel food
Jollin: I wish I wasn't so lonely so I had someone to go grilling with. wanna come Lexus?
Lexus: heck yeah man! I'll bring my whole tub of infected cream cheese too!!
everyone: god these fucknuts