A person who has a despicable, hypocritical characteristic or attitude that others think highly of, glorify, or defend him or her and is far from being a decent person, which is inferior to it as well.
Someone who makes a situation unnecessarily stressful or inconvenient in a manner that benefits nobody. Often includes usage of emotionally manipulative tactics such as gaslighting, moving the goalposts, and guilt-tripping.
P1: "If you don't buy this off me I'll burn it all."
P2: "What is the point of doing that? Just give it to me."
P1: "Nope, $600, take it or leave it."
P2: "Oh my god, you're such a psychological dickhead."
Total Dickhead Event: a public drunken stupor so embarrassing, humiliating, and utterly mortifying as to convince the most hardend boozer to giving up the drink.
“I’ve been on the wagon since my Total Dickhead Event at Meghan and Harry’s wedding.”