2) A figurative term for a one's weakness, largest flaw or their prevention of success.
2) We would have aced this presentation if Leo wasn't in our group. He didn't study at all, he's the chink in the armor.
2.) Mistakes made by Asian-American athletes of Chinese or Taiwanese descent during a game that results in a loss for the team.
3.) A racist slur with a double meaning, the use of which under the previous definition can get you fired if you work for a news agency such as ESPN.