The phrase "to curb the habit" means to control or limit a behavior that you do regularly or too often.
Sentences with «to curb the habit»
When you decide to stop breastfeeding, you will have to curb the habit of breastfeeding and the child's habit of reaching for your boobs. (toptenstrollers.com)
If your children are at the root of your accidental purchases, you can set up parental controls to help curb that habit. (tomsguide.com)
If you ever find yourself with a baby eating every hour, you'll need to learn to curb this habit unless the baby isn't gaining weight. (checkpregnancy.com)