A derogatory term referring to a Chinese person. The referrence is made because the face is preportionately flat, and thus the Chinese person potentially possesses the ability to literaly bite a wall.
Bad Asian Driver: *Cuts you off*
You: "Damn wall biter! Learn how to drive!"
a chink,(called this because they have flat faces which enables them to bite walls.)
get off the road ya damn WALL BITER