help the tiger to pounce on its victims ❍ 金旺长到十七八岁，就成了他爹的好帮手，兴旺也学会了～，……(赵树理《李有才板话》7)When Jin Wang had grown into his late teens,he became his father’s accomplice,helping the tiger to pounce on its victims.
帮虎吃食bānɡ hǔ chī shí
比喻帮助坏人干坏事。help a villain do evil, help bad people to do evil things