To have a verbal contest over progressively worse mum jokes. It usually goes around full circle before someone gets mummed-out.
Kevin: Your mum's a slapper.
Joe: Your mum is a bigger slapper!
Kevin: Your mum invented being a slapper!
Joe: Your mum wrote the slapper's handbook!
Kevin: Your mum followed every move in the handbook!
Joe: Are you challenging me to a mum-off?
Kevin: Your mum likes a challenge... etc
Joe: Your mum is a bigger slapper!
Kevin: Your mum invented being a slapper!
Joe: Your mum wrote the slapper's handbook!
Kevin: Your mum followed every move in the handbook!
Joe: Are you challenging me to a mum-off?
Kevin: Your mum likes a challenge... etc
by rob1982 January 3, 2013
Get the Mum-offmug. Two or more people sitting in cuck chairs watching each other, waiting for someone to start jerking off or fingering themself.
Last night Jill, Rob, and Robb had a Mexican cuck off. They stared at each other for hours until someone broke and starting jerking.
by Cuckin-cousins May 25, 2024
Get the Mexican Cuck Offmug. by skankhunt32 December 2, 2016
Get the cut the boots off the babymug. by C.B.Brown June 8, 2023
Get the Get offmug. by SleepyJerry August 27, 2022
Get the fork offmug. Here’s a sentence using "mouth off":
She's always mouthing off about how much better she could run the company herself.
She's always mouthing off about how much better she could run the company herself.
by Arminkshipper August 5, 2024
Get the Mouth offmug. When you’re super faded and you got cotton mouth and your lips are dry and you gotta lick em to keep em hydrated
by StainboyP August 22, 2021
Get the off a lickmug.