Usually sharp tongued and self important, an oxy-moron is generally an insecure, insensitive, raucous ass who cops an ironic pseudonym as a shield for presenting unsolicited and ignorant remarks regarding people and events about whom he or she knows very little.
niceboi - "That girl has really big boobs and she wears t-shirts by Snorgtees. Point and laugh with me."
Intelligent person with good taste - "It's time you stopped being an oxy-moron and shut the f*** up already. Nobody cares about your decidedly uninformed opinion."