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1.
A man who has his hair dyed peroxide blond making it a similar colour to cum.
Darren move your spunk nut, I can't see the footie
by Andrew Wood January 16, 2007
 
2.
This is the term to describe a males scrotum being covered in seamen after either a successful session of intercourse or masturbation though underwear resulting in the ejaculated seamen still be contained within the underwear.
"Oh god James that was good but all your seamen has ran down and is on your scrotum, you have spunknuts"
by James Waters June 12, 2008