If you have unhealthy habits, it costs you microlives. If you smoke, each cigarette reduces your life expectancy on average by around 15 minutes, so two cigarettes loses you a microlife. […] And for every extra 5kg you are overweight, it will cost you around one microlife a day. […] If you survive your trip on the motorbike, then your micromort gets forgotten and you start the next day with a clean slate. But if you smoke and drink all day, and live on a fast-food diet, then your microlives will accumulate from day to day.
Source: wiktionary