Make people (audience) excited, laugh, or enjoy a lot while performing or making a speech
If you, your performance, or your speech brings the house down, your performance or speech is so good that the audience enjoys it a lot, becomes excited, applauds (clap their hands), or laughs a lot.
Example:
Sarah is a musical genius. Her performances always bring the house down.
The Prime Minister brought the house down when he made his monumental speech in 1965.
He's a very poor actor. Instead of bringing down the house, he always empties it.

This picture was electronically drawn by Erika Aoyama on January 15, 2004.
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Last modified on September 8, 2004.