Pseudo-Chinese gibberish -- didn't Shaq do the same to Yao Ming when he first came in the league? I think Yao Ming played it off: "Chinese is hard!" or something like that.
Wikipedia: ... Lin has regularly heard bigoted jeers at games such as "Wonton soup", "Sweet and sour pork", "Open your eyes!", "Go back to China", "Orchestra is on the other side of campus", or pseudo-Chinese gibberish. Lin says this occurred at most if not all Ivy League gyms. He does not react to it. "I expect it, I'm used to it, it is what it is," says Lin. The heckling came mostly from opposing fans and not as much from players. According to Harvard teammate Oliver McNally, a fellow Ivy League player once called Lin the ethnic slur chink.