The opposite of a person you want to have sex with. Someone who is literally the opposite of all the things you find attractive physically. You would never bone this person, even if paid a large sum of money.
Iggy Pop, a gross wrinkly tan old dude with long greasy blonde hair, is my personal negabone.
when one becomes instantly sexually aroused by something nerdy. this includes video game content, anime, cosplay outfits and costumes, and nerdy tattoos.
Neville: Dude, my girlfriend sent me a picture of her in her new costume... when I saw tabbie dressed as sexy Luigi I got such a nerdboner I had to go bust a nutt in the shower