How to use wildcard in Google search

This example demonstrates how to use a wildcard in Google search.

Lets suppose we have this idiom: "if you have a somebody for a friend, you don't need an enemy", but we do not remember exactly what that  somebody would be.

Let's ask Google: "If you have a * for a friend, you don't need an enemy".

And here we go. For the record, at the time being, Google thinks this somebody is either a Hungarian or a politician. I assume, in fact it is a Hungarian politician :)