I'm

I'm not made of money!

something that you say in order to tell someone who asks you for money that you do not have very much. No, I can't lend you twenty pounds. I'm not made of money, you know.

See also: made, money

That's my story and I'm sticking to it. (humorous)

something that you say when you have given an explanation about yourself which is not completely true. I'm not fat, I've just got big bones. Well, that's my story and I'm sticking to it!

See also: stick, story