Bit of a weird incident at work today

I'm working the drive thru and an asian woman gets to my window. While I'm waiting on her stuff to finish to hand out she's pulling on her eyes laughing and turning to her friend then she looks at me laughs and pulls on her eyes again and she made sure I saw it. I don't know if she was making fun of me or what because I got no clue what language she was speaking to her friend or what the hell she was doing. Struck me funny I guess