《哈利波特6》中双胞胎兄弟在笑话商店的经典台词是：

"Why are you worrying about You-Know-Who？ You should be worrying about U-NO-POO -- the Constipation Sensation That's Gripping the Nation!"

其中，"You-Know-Who" 是神秘人的意思，而 "U-NO-POO" 中，"POO" 指儿童大便的意思，"U" 代指 "YOU"，连起来就是让你不能大便……