If you say to someone 'take it or leave it,' you are telling them that they can accept something or not accept it, but that you are not prepared to discuss any other alternatives.

What is take it or leave it meaning?

1 —used to say that one will not make a better offer than the offer one has made I'll give you $500 for the camera, but that's my final offer. Take it or leave it. 2 —used to say that one does not care about or is not excited about something "Do you like lobster?" "I can take it or leave it."

Can take it or leave?

said about something that you like, but that you do not love or need strongly: My sister's absolutely crazy about chocolate whereas I can take it or leave it.