by Pugzli April 21, 2019

Short for Molybdenum, has an atomic number of 42, (the true meaning of life, the universe, and everything according to Deep Thought, the computer from The Hitchhikers Guide to the Galaxy).
Oh, Mo, what would I do without you?
by m0llyBd3nim42 August 11, 2018

Mo is my best friend
by ILoveLawnmowersWayToMuch October 31, 2019

by Mominous December 13, 2020

by samiswho584 November 15, 2021

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

Tim: if you drink motor oil can you die Jimmy : yes you fucking mo Kenny : Gabriella likes girls Frank : yeah I knew she was a mo Michelle: fuck you you Mexican asshole Santana shut the fuck up you fucking mo
by Deke In your ass June 27, 2019
