do a number on something
do a ˈnumber on somebody/something
(informal, especially American English) hurt, damage or criticize somebody/something seriously: Sun and pollution can really do a number on your skin. ♢ To the delight of Republicans, the press did a number on your senator (= criticized him severely).do a number on something
1. tv. to urinate or defecate on something. Billy did a number on the bathroom floor.
2. tv. to damage or ruin something; to destroy something. The truck really did a number on my car.