A Juggernut occurs when someone abstains from ejaculating for a long period of time(both sex and masturbation) until they finally relieve themselves in the most unstoppable and largest nut of their life.
"It had been a month since i last nutted, but I fucked that girl trixie last night and gave her the Juggernut... She was covered from head to toe"
The manliest state of being. Basically being able to do any of the following: chop down trees with your penis, eat rocks for breakfast and shit out gunpowder, headbutt your front door open, causing it to splinter into pieces, jump off a cliff and break your fall with your face, wrestle sharks, kill a bear with your bare hands, etc.