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. by scorpioicon November 20, 2021
Get the litch on mumsmug. 
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. by Lucas Pennington September 23, 2021
Get the yarg farg ur mum has a hard yardmug. by The bot April 5, 2022
Get the Ur mummug. A mother or a mother of a child. The word can be used as an insult on someone typically on your mum or you.
your mum.
your mum.
Steve: "Hey Jimmy tell me a joke"
Jimmy: "your mum"
And that was the last time we ever saw Jimmy again...
Jimmy: "your mum"
And that was the last time we ever saw Jimmy again...
by Senor Ghost November 25, 2021
Get the your mummug.