脑瓜顶上长疤，脚后跟流脓

nǎo gua dǐng shàng zhǎng bā，jiǎo hòu gēn liú nóng——cóng tóu huài dào jiǎoYxq汉语字典

比喻人非常坏，坏透了。Yxq汉语字典