The psychological sickness one contracts when Mumfords and Sons backs out as the headliner of the music festival you're attending. Symptoms include, but are not limited to: intermittent frowning, being teased by your peers and randomly storming off in the middle of the show that replaced Mumford and Sons.
"Janet was really looking forward to seeing Mumford and Sons play at Bonnaroo this year. When they were suddenly replaced with Jack Johnson, she came down with a bad case of The Mums."
by Chicketychina11 June 21, 2013
Get the The Mumsmug. 
A person with a face like a mum or dinner lady; typically plain, old or generally unprepossessing.
Mum Face (n) or Mum Faced (adj) // Mom Faced (U.S)
Mum Face (n) or Mum Faced (adj) // Mom Faced (U.S)
by PeaHead October 22, 2013
Get the Mum Facemug. She is a rubbish which gave less IQ and EQ.She talks much and she is very annoying.When Matthew Mak feels annoyed.She will 家暴 and hit Matthew Mak.And Matthew Mak almost die
by Matthew Mak January 23, 2022
Get the Matthew Mak’s Mummug. by Ok u gay October 25, 2018
Get the Ya mummug. by ShinDigDoo December 27, 2020
Get the Oscar's Mummug. from what i know this is a australian word, mums is another way of saying you're swearing on your mums life
by yeeeeeeeeeeeet yah May 12, 2020
Get the mumsmug.