四马分尸五马分尸sì mǎ fēn shī

be cut into (/torn to) pieces; be drawn and quartered; tear a body limb from limb
❍ 瓜分就不得了，各霸一方，那就～，…… (李六如 《六十年的变迁》 Ⅰ —89) Surely partitioning would be a fatal blow to us. That would mean China will be cut into pieces by the foreign powers,each one riding roughshod over part of her body.
❍ ～谁不怕呀！ (李六如《六十年的变迁》Ⅰ—228)And who is not afraid of being torn to pieces?