Ninjer
It is used as a slur towards Chinese and Korean people and is often rude
That Chinese person is a ninjer
Breaking to peoples houses sneakily. This term can be used in the middle of a robbery.
Chrissie: "We are in the middle of Ninjering"
Matilda: "Yeah, stay quiet or they'll hear us"
Anya: "Oh right sorry but later can we go drinking in the field"