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From the Latin root "rubius", meaning small brain. And from the Russian "rubanikov", meaning stone drunk. Also questionable Ehtiopian origin, indicating a state of lethargy induced by narcotics.
Modern Definition: A failed attempt at humor, often perpetrated by he who is named "ruby". Syn: Retarded
Dude, did you see the teacher pull a Rubyism?
Yeah man, it was retarded.
Just like that Ruby kid.
Related Words

rubyisabadbitch 

A dumb mcyt stan and makeup artist on tiktok. she thinks shes famous so shes putting herself in urban dictionary.

she is known for these videos (in order) ;

teaching her parents mcyt culture
of her wearing dt merch (why did that go viral)
scary minx vs cashier video
her whole class hearing her "my name is dream and i am a bitch" ringtone
drama smp episode 2 ft. Sapnapsleftasscheek
dream give patches the phone; gimme bank account video
crying because dream remembers her
baby sapnap (MOST VIRAL VIDEO ATM)

im the joker baby perfectly timed w jschlatt (again, WHY DID THAT GO VIRAL?!)
technoblade teacher.

that took too much work. i really am a gemini.

(also this is for urban dictionary staff; DONT DELETE THIS! ik im not rly famous but ive been recognized 3 times on omegle so that counts for something)
Your a mcyt fan? lets hope ur not like rubyisabadbitch.
Someone who is a devout follower in Ruby. Ruby is a goddess that represents wealth and all things good in the world.
Those rubyists really know how to live.
rubyist by Rubyyyyyyyyyyyyy March 15, 2021

Rubynism 

social, political, psychological rubynism

Anti-Rubynism: Live the Life to the Foolest!

e.g., the gritty anti-rubynism among leaders at the war talks.
Rubynism by Hawllie Dunn July 1, 2021

rubyisweeb 

A Cool chill guy who streams and a music producer
Rubyisweeb back at it again
rubyisweeb by RubyLULZ October 4, 2020
The belief that the character known formally as, "Rudeus Greyrat." Is the perfect definition of a human being and one worth defending.
Jason's belief in Rudyism led him to defend Rudeus Greyrat as the perfect example of humanity.
Rudyism by Robert. S. Jenkins December 20, 2024