jacknutz
a nickname for someone who did something so stupid it made your brain hurt or someone who is a total tool but you still like them a little or just a way to say hi when you don't want to use their real name.
Jacknutz, I saw you eat a whole pizza by yourself and then cry.
Hey Jacknutz, did you just trip over your own feet again?
Jacknutz, why are you wearing socks with sandals? It’s a crime.