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3.
Someone who is mostly Asian. Like the non-Asian kids who play DDR, drink boba tea, watch anime, and, like the kid in my English class, join clubs at school for Asians(Asian Student Alliance, Chinese Culture Club, etc)
(sees white kid playing DDR with a group of real Asians while drinking boba tea, while talking about anime)
Me: Wow that's fucking amazing. Look at him multi-task like that.
Friend: So what? He's still a masian.
by Emelia December 05, 2005
 
1.
1. A person who is mexican and asian.

2. Someone who looks both mexican and asian

3. A person who had both the stereotypes as an asian and mexican

Mike - Wow, that asian kid can hop fences really well!
Liz - Must be a masian.
by Lizabeth A March 07, 2008
 
2.
a masian is a person with one mexican parent and one asain parent that has sex and made a masian baby. So, instead of saying a mexican-asian, we can all make life easier and say masian.
DeSean-- "Hah, did you hear that Jackie and Brandon had a masian baby."

JaMarcus-- "Whats that?"

DeSean-- "A masian is a person with one mexican parent and one asian parent that has sex and made a masian baby."

JaMarcus-- "Oh Dang."
by anonymus, June 02, 2013
 
4.
A masian is a muscular asian man or woman; but most commonly a man.
Ah I really think masian men are fit.
by oKay7890 January 18, 2010