You use the word "DAN" whenever your friend or anyone you know is being overly difficult.
EX: Everyone has that
one friend or family member who's a DAN, for instance your friend has a empty tank of
gas and just got paid, you and all of your
friends are going to the beach, there's 12 of you and 2 people are driving instead of offering to drive you insist that everyone crams into the cars, that's a Dan.