Meaning/Usage: To agree after the other person demands it 在他人要求后同意
Explanation: "Insist" means to demand something and that they will not accept refusal. It became common to say this phrase by itself when the other person insisted on something.
"We will stay longer if you insist."
"We can go another night if you insist."
"I will call her if you insist."
A. "Thanks for meeting us out for dinner."
B. "It was nice of you to ask."
A. "Tonight is our treat. I insist."
B. "If you insist."
Other Common Sentences
"If that's what you really want."
"If you are firm with your decision."