Definition from Wiktionary, the free dictionary
dicknut (plural dicknuts)
- (vulgar, informal, slang, derogatory) An asshole; a stupid, annoying or otherwise undesirable person, especially a man.
2007, Melissa Schroeder, A Little Harmless Sex:
- Alone, she sank into one of the chairs in front of her desk and tried to calm her nerves. But no matter how much she told herself to forget the dicknut and his accusations, her hands wouldn't stop shaking.