A chinese meatball is when, during foreplay, the man takes out a small knife and whittles his bell-end until it is sharp and pointy. He then uses it to poke out the eyes of his partner. The next step is for the man to cut out his own testes, and put them in the eyesockets of his partner.
Terrence: Hey man! Look at that rooster over there!
Jill: Sorry, Samuel gave me a Chinese Meatball, my eyes are testicals.