bad habit

Translations
плохая привычка
She has a bad habit of biting her nails.
У неё есть плохая привычка грызть ногти.
Definitions
A bad habit is a negative behavior or practice that is often detrimental to an individual's health, well-being, or productivity, and is typically difficult to break or change.
Words
bad

adjective
плохая
habit

noun
привычка