It is a made-up word commonly used in Malaysia, especially in Johor Bahru. It means a person who's obsessed with his/her crush, mostly his, so they make videos and portfolio about them. they are also known as 'creep' or 'stalker'
(You pronounce it like jā-má-sùn)
(You pronounce it like jā-má-sùn)
by DONALD TRUMP IS GOD March 9, 2020

person 1: "oh whos that on your wallpaper"
me:"thats allen ma shi quan, hes talented and beautiful, hes my idol"
person 1:"oh youre right, he does look pretty"
me:"thats allen ma shi quan, hes talented and beautiful, hes my idol"
person 1:"oh youre right, he does look pretty"
by anonymous November 22, 2021

A smart person who always cares for everyone and is alway nice. A Jeffrey Ma is a really hilarious person who everyone likes. Jeffrey Ma will alway be successful in life and will rarely fail.
by Jeff is the best November 9, 2020

by Fat cock sucker October 4, 2020

A derivative of the phrase "Oh my". Used by popular streamer YourRAGE and his friends and chat when they see or hear something crazy.
*YourRAGE watches a video of someone getting smacked on stream*
YourRAGE: "O MAAAA"
chatter 1: "O MA"
chatter 2: "O MAA"
YourRAGE: "O MAAAA"
chatter 1: "O MA"
chatter 2: "O MAA"
by Meiloorun December 15, 2023

Tomás is a really all-around awesome guy who doesn’t do anything bad to anyone ever. Everybody wants Mas Tomás. They say they don’t, but they most definitely do. Everyone is jealous of Tomás yet nobody really knows him. Tomás always gets that bread.
by Mas Tomás November 13, 2018
