垫背

肯定会拿你们底层 垫背

(我知道上层腐败) ── Previous context

“will definitely use you, lower-level staff, as scapegoats.”

给你当 垫背 的呀

(可你别拉着我们家菊儿) ── Previous context

“...to be your sacrificial lamb.”

谁拿她当 垫背 的了

(给你当垫背的呀) ── Previous context

“Who's using her as a sacrificial lamb?”