嗜痂成癖 shìjiāchéngpǐ
[be addicted to;have an addiction for stamps the like;like to lick sb.'s scabs] 嗜:爱好。痂:疮口或伤口表面凝结的硬壳。比喻爱好怪诞的事物已成为一种癖好。也说“嗜痂之癖”
语出《南史·刘穆之传》:“穆之孙邕性嗜食疮痂,以为味似鳆鱼。”