The kids tucked into the cookies their mom made as soon as they got home from school.

tucked 是动词 tuck 的过去式，tuck 本意是"把...塞进、掖好"，在短语 tuck into 中表示"狼吞虎咽地吃"。 tuck into 是一个固定搭配，表示"开始津津有味地大吃"，通常用于形容迫不及待地享用食物。