'A Yong Move' is a term used to describe an unthinkably idiotic decision or act by a person of Oriental heritage.
The term usually is used for a male, and may or may not link to racial stereotypes.
Example 1.
"Hey look at the car! How the hell did they manage to end up crashed there?"
"Definitely a Yong Move"
Example 2.
"That guy's crazy bro"
"Yep, Gonna be making a few Yong Moves tonight..."
Example 3.
"Mate, what are you wearing - that's a Yong Move right there"