slack-jawed
adjective/ˈslæk dʒɔːd/
/ˈslæk dʒɔːd/
- having your mouth open because you are shocked or confused
放松的下巴：因为震惊或困惑而张开嘴 - She just sat there slack-jawed, with nothing to say.
她只是呆呆地坐在那里，什么话也说不出来。 - a bunch of slack-jawed idiots
一群呆瓜
- She just sat there slack-jawed, with nothing to say.