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A feeling of intense regret and personal worthlessness after a night, weekend, week, month, or even year (possibly, but not always containing copious drunkenness/drug abuse) of moral turpitude.
"How was your weekend?"

"Oh, man, I got drunk, had sex with my friend's sister, crashed my dad's car, and told off my best friend. I've got a serious moral hangover."
by JLB3 August 15, 2005
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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