sit tight idiom
保持不动，呆着不动
to stay where you are
You'd better sit tight and I'll call the doctor. 你最好呆着别动，我去叫医生。
mainly UK固执己见，坚持自己的主张
to refuse to change your mind
My parents tried to persuade me not to go alone, but I sat tight. 我的父母试图说服我不要单独前往，但我执意如此。