The day of the week that lies between Wednesday and Friday. In scheduling abbreviations, the days of the week are often indicated as "M T W R F." The day between Wednesday and Friday, therefore, can be referred to as Rarsday.
Referring to this day as Rarsday instead of it's traditional moniker (Thursday), generally indicates drinking
, merriment, and other bits of debauchery
I just woke up next to three hookers in a pool of my own vomit with coke scattered all over myself and a new dick piercing that I have no clue how I got. That was one hell of a Rarsday.