Staying up all night from Sunday to Monday morning. Two days rolled into one

The phenomenon of having to come out as bisexual to the same person/people repeatedly because they assumed or hoped that your sexuality was a "phase." Refers less to the holiday and more to the 1993 Bill Murray comedy film in which the main character experiences the same day over and over.

Noun; The comination of the days Sunday and Monday. Often used to describe a 48 hour period of sleeplesness between Saturday and Tuesday.

When you take Monday off work because you just need an extra day off. It's not Sunday and doesn't feel like Monday, it's Smunday. Similar to how Brunch is a hybrid between Breakfast and Lunch.

figuratively spoken, the day between sunday and monday;

actually its a monday where you decide to not DO or GIVE a fuck, just like on sundays

the perfect smunday is a day, where you don't even know if it's sunday or monday

hours between Sunday A.m till you go to work after the weedend

Sunday/ Monday-

The Days you spend recovering from Thriterday.