XYZ是一个英文缩写

完整形式是Examine Your Zippers即：你的拉链开了/检查你的拉链

比如
A: “Yo, man. X Y Z!” 嘿，你拉链开了。
B: “Oh shit! I was wondering why everyone was laughing during my presentation.” 天哪，我还在想为什么刚才作报告的时候每个人都在笑。