Hang up your fiddle when you come home - Idioms by The Free Dictionary
hang up your fiddle when you come home
hang up (one's) fiddle when (one) comes home
To cease to be pleasant, charming, or amusing once one arrives home. He's always cranky after work—it's like he hangs up his fiddle when he comes home.
hang up your fiddle when you come home cease to be cheerful or entertaining when you are in the company of your family. chiefly US