A phrase normally used when an outsider tells you something crazy that just happened but in actual fact it is a common occurrence in your strange fucked up life and just like any other day.
Phil - "Holy crap! Geoff just tripled himself in the middle of the parking lot!"
Kevin - "It must be Tuesday."
Kevin - "It must be Tuesday."
by Alekso Schmekso June 7, 2016
Get the must be tuesdaymug.