kiss something better
kiss (something) better
To kiss an injury so that someone, usually a child, will feel better. Oh, did you bonk your elbow? Let Mommy kiss it better. You actually shouldn't kiss scrapes and cuts better—you could introduce bacteria and get the wound infected.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
ˌkiss something ˈbetter(spoken) take away the pain of an injury by kissing it: Come here and let me kiss it better.
Farlex Partner Idioms Dictionary © Farlex 2017