“You really take the biscuit!”

Question

Is there an American version of "You really take the biscuit!"? As in taking the last biscuit, i.e. it's incredible how selfish you are.

Answer 1

We do have the expression "you really take the cake" which could be used in the same context, but also means to be the best at something one does. E.g. "When it comes to comedy, he really takes the cake."

As for "take the biscuit", I've never heard it in the US.

Answer 2

Take the biscuit or cake is excelling in something - positive or negative

So on its own it means nothing; after some act or some expression, it means you surpassed whatever was expected.

Here is my take

When it comes to selfishness, you really take the biscuit/cake

That was amazingly kind of you, you really take the biscuit

http://www.worldwidewords.org/qa/qa-tak3.htm has a rundown of etymology.

Answer 3

Take the cake is closest, though take the biscuit is used in a more uniformly negative manner.