I was QQ-ing with a friend, who is from China, and he said something strange: "米知道？" He said "米" refers to me. He can't explain it to me in English, but if I had to guess, is "米" the Chinese equivalent of the hispanic "mami"? Or am I mistaken? Can I, a woman, use the term "米"? What context / who can you use the term "米" with?