Ball sport that is dominated by Asians (ping-pong, badminton etc.)
Man 1: I bet I can beat Chen in table tennis.
Man 2: Nigga you crazy! You can't beat a chink in rice ball.
Condescending insult used typically against those of east asian descent. Usage of this phrase has dropped considerably since WW2 however
Sergeant: "Time to wake up the rice balls with artillery!"