First day of the work week after excessive partying, resulting in a clouded or confused physiological state of mush brain. Typically there are increased instances of absenteeism or little to no productivity on a Mush Monday
Chris grab me another beer!!! I have already called in sick for work tomorrow. There is really no sense in going. After 48 hours of drinking it would just be another Mush Monday.
by somechic July 27, 2009

The diarrhea which usually follows a weekend of drinking and poor eating. Often not painful, but rather extremely relieving and requiring of multiple flushes to fully dispose of.
Boss: "Late to work on a Monday again Phil?"
Me: "Sorry but I had a Monday mudslide and my girlfriend threatened to break up with me if didn't clean the bowl afterward."
Culver's drive thru girl: "Hi welcome to Culver's, would you like to try our flavor of the day Monday Mudslide?"
Me: "I already had one this morning so no thanks but I'll take a hot fudge sundae"
Me: "Sorry but I had a Monday mudslide and my girlfriend threatened to break up with me if didn't clean the bowl afterward."
Culver's drive thru girl: "Hi welcome to Culver's, would you like to try our flavor of the day Monday Mudslide?"
Me: "I already had one this morning so no thanks but I'll take a hot fudge sundae"
by Yahoo! Answers Phil J July 18, 2011

A jewish holiday in which jewish people go to Walmart or any other store that sells candy and buys the discounted easter candy
by BigBoy69 April 6, 2015

The mindset of a middle-schooler (or anyone, really) on a Monday (A.K.A. dead inside) Usually is apparent when someone says something stupid on a Monday.
by nagoL52105 January 7, 2019

A phrase coined Robert Taylor and Jono Pryor from the Rock 90.2fm in New Zealand.
This phrase is used to create a sense of excitement about the much maligned day of the week know as Monday.
This phrase is used to create a sense of excitement about the much maligned day of the week know as Monday.
by Rock listener June 9, 2011

When you have to piece together what's happened over the weekend because you were too drunk to remember.
Me: How drunk was I last night?
Friend: So drunk you held up my cat and screamed "SIMBAAAAA"
Me: Man I am sick of playing Monday detective.
Friend: So drunk you held up my cat and screamed "SIMBAAAAA"
Me: Man I am sick of playing Monday detective.
by specialkk47 December 5, 2011

by bvcheerchick1 April 2, 2011
