A die-hard fan is somebody who is completely 100% obsessed with their favorite game, band, movie, etc. these people wait in long lines, in the blistering cold, just to bring home the new "thing" they are fans of.
Look at Matthew, over there. He's been waiting outside GameStop for 3 weeks, just to get the new Kingdom Hearts. He's such a savage die-hard fan.
by Savagematty September 23, 2015
a fan who wins and loses with their team. knowing that their team hasnt won a stanley cup yet, but knows one day it will happen and it may not be tomorrow but is still standing up in the crowd, alone, when the Sabres are down 4-1 or more cheering and motivating the Sabres!
Caitlin and her friend Mike stood by the Sabres when they had a 10 game winless streak in January but still loved the team. A die hard sabres fan wins and loses with their teama nd knows what it takes to be a real believer.
by Kaleta's Girl April 1, 2008