The act of being belligerently drunk. Usually involving no more than two people. The drinker is constantly dancing. Strange Dance moves involving squatting, awkward body positions, and off beat dancing to the music usually alone.
Blacking out is a key part in being a Shitshow.
Hannah- "Emily do you remember last night?"
Emily- "Not at all"
Liz- "You two were a complete Shitshow when you were dancing on the tables"