(To) Sit tight

To sit tight is a strange English idiom and it literally means that you sit down squeezing your body in a tight way, which if you did it would be very uncomfortable, not to mention you'll look really strange.

这是个有点陌生的英文俚语，字面意思表示你做起来很拘谨，这会让你感到不舒服，更不用说让你看起来很怪了。但如果一个人告诉你这句俚语，他们是想让你安静地等待，在接到指示前不要采取行动。

"Mrs. Carter, do you have any idea when the exam results are going to come out?"

"Who knows Johnny, sometimes they come out quickly but it could take some time. You're just going to have to sit tight and wait."

“卡特夫人，你知道考试成绩什么时候出来吗？”

“谁知道呢，强尼，有时候出来得很快，但需要些时间。你就耐心等一等吧。”