A tell tale sign that someone is high. It's what happens to your eyes when you are high on dope and try not to laugh... your eyes sometimes resemble those of asians (or the derogatory word chink) --> Therefore the word chink eyes is born.
Q: Damn did Mitch just come to class high??
A: I am not sure....oh ya he is. He's got them chink eyes.
After smoking a nice bowl or two from the hookah or nice fatty or blunt of that hindu kush like me and froghead just did an hour ago, your eyes start drooping down as if you look asian. hence the name ,"chink."
sorry if my eyelids fall further than yours does. its not my fault i look fuckin chink eyed as shit all time.