赤子 あかご をひねる
akagono teo hineru

Godan Verb (ru)
Idiomatic Expression

1. to take candy from a baby; to accomplish something with ease; to twist a baby's arm — literal

そんな こと、彼 かれにとっては赤子 あかご ひねるようなものだ。
sonna kotowa kareni tottewa akagono teo nejiru yōna monoda.
For him, that will be like taking candy from a baby.
Other forms: