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1.
someone who is just a major pain in the hoo-hah
Man, that Teller is a total unirection
by Bob da Builder September 29, 2005
 
2.
A prolonged erection spanning multiple hours
Used as an insult: "You're just a unirection to me."

"My unirection hurt so much at the end, man."
by Nate Camus September 29, 2005