slough something off
phrasal verb with slough verb [ T ] uk/slʌf/ us/slʌf/
literary除去，摆脱
to get rid of something or someone unwanted
He seemed to want to slough off all his old acquaintances. 他似乎想摆脱所有的熟人。
biology （蛇及其他爬行动物）蜕（皮），脱（皮）
When snakes and other reptiles slough off their skin, they get rid of an old, dead layer of skin.