meliorist 

The belief that improvement of society depends on human effort

i am a meliorist and tomorrow will be different

meliorist by @german_wm October 4, 2013

Memorist 

a person who practices, is expert in, or is concerned with remembering, retaining and recalling past experiences and information

Tessa a major trivia nerd and OP memorist; she straight up knows everything dude.

Memorist by MaxwellMurdoch March 19, 2020

Melixrism 

From a distance, she may just seem like a rude Vietnamese person, but once you get to know her you will see that she is actually a very nice person and a good friend. You will never get bored when she is around. You can tell her anything, just don't expect a very intelligent reply. She is the kind of person who binge watches Minecraft, but has never actually played it.

If you're not friends with Melixrism then you're missing out

Melixrism by Connor Y#8888 March 30, 2021

melloristic 

A derogatory term for a person who, although intelligent, often behaves in an incorrigible or immature manner. Alternatively used to describe incorrigible or intolerable behavior with the intention of reprimanding.

Although the melloristic child failed to complete his homework, he still pulled an A on the test.
The student demonstrated a melloristic disregard for his abilities by failing to complete his homework.

melloristic by Rising_Tide December 31, 2016

melonist 

An individual who supports the movement for the equality of melons.

"Hey Bill, melon equality is on the rise, it's a good day to be a melonist"

melonist by ClownWattGryll May 8, 2016

meliorism 

only the bestest person ever. leader of the panda lovers of the world, who are trying to improve the world by eating bamboo. awesome-sauce.

meliorism is fucking amazing.

meliorism by mmeellee December 9, 2010

Meliorism 

It is the act of hold anime elitists, bullies and all other toxic fandoms accountable for their harmful actions

sixthfold pulled a meliorism when he defended david for liking saitama better than goku and then kyle punch a whole in the wall because you know bullying

Meliorism by notyourtypicalwitch May 27, 2020