give the show away

Tento one, the woman will give the show away.

Both sides know that the whole thing is a farce, but seeing that the original idea was devised by the thinkers and humorists that lived when the history of the nation was in twilight, it would not do for their far-off descendants to give the show away, and so with solemn faces they play out the thing, as though a tragedy and not a comedy were being enacted.

If you’re going to tell all your friends, you may as well give the show away at once.

"Oil it well, or the rasping will give the show away."

You love your liquor not wisely but too well, and you’re likely to give the show away.