A spontaneous combustion of uncertainly. Usually sparked by drinking, smoking, and a taller-than-average-height-man with an uncanny ability to persuade everyone present to participate in an assorted variety of creative nudity before the clock strikes twelve.. On most occasions, followed by a semi-philosophical explanation of the quantum theory behind all the events of the night.
Dude...I was beltsering all night and now I am dating two birds at a time in a delicate and profound way!
Taking a day off from your adult responsibilities to relax and reconnect with your inner child by watching movies / television ads from your childhood, eating the same food etc.