“Let your hair down” means “to relax and do what you want”. Example: It’s been such a hard week at work. Should we all go out tonight and let our hair down a bit? Origin: This phrase originated in the century, when women were expected to wear.
“Bring the house down” means “to entertain people very successfully, so that they laugh or clap for a long time”. Example: If the band wants to bring the house down, they should play their most popular song. Get our apps for learning English:.