A term used to describe someone (usually in a discord server) who is self-centred and biased when it comes to people. If someone is called a "Mo", they are usually considered to be unsympathetic and unable to look at other people's perspectives.
Person A: Man, I love encouraging a toxic community and doing whatever I like with my server members without considering its consequences and the demolishment of my reputation that will follow.
Person B: You're such a mo
Person B: You're such a mo
by Your Average BBB Member June 17, 2023

Mo is my best friend
by ILoveLawnmowersWayToMuch October 31, 2019

by Thizzman September 23, 2008

A brute machine who talks unprecedented amounts of shit and takes the gerth of any cylindrical object up the ass whilst having a red gimp ball in his mouth.
Mo Mo - "To be honest lads she wasn't a brute!"
Other guy - "She was chronic, she looked like Predator. You're such a Mo Mo"
Other guy - "She was chronic, she looked like Predator. You're such a Mo Mo"
by jmantizzle November 3, 2010
