The phenomenon in which an amount of alcohol when consumed after sundown has a much stronger effect than the same amount consumed during the daylight hours. Usually resulting in idiotic behavior and premature pass out, sometimes followed by a sleepwalking type state and urination in random places such as closets, the living room, on the cat, etc...

When its late at night and you just don't care what your saying or doing and say anything off the top of your head to ANYONE.