It's a sign of ...
bad luck,
unhealthy habits,
hot tempers,
and excessive sensitivity.
Basically, short philtrum make bad business partners.
People with a long groove are less trusting and more suspicious while people with a short groove are more likely to be flattered.
Men generally have a longer philtrum, making them less susceptible to deception than women. If your wife has a short philtrum, you can compliment her as much as you like and she won't suspect you.
