I'm glad you're not a tightwad.

我很高兴你这么大方。

Or is one of you a tightwad?

或者，你是个“吝啬鬼”？

She's such a penny pincher/tightwad.

她真是个守财奴/小气鬼。

Absolutely not! He's a real tightwad!

绝对不会！他是真正的小气鬼！

You don't have to blow your savings, but don't be a tightwad.

你不必吹嘘你的珍藏，但不要做吝啬鬼。