1. the inability to partake in live music events in the days or time following a celebration or fest.
2. a relentless state of exhaustion following a periodic commemoration, anniversary, or celebration.
3. perpetual bitterness and withdrawal following a period or program of festive activities, cultural events, or entertainment.
4. the antithesis of gaiety; revelry; merrymaking.
5. fuck you.
Girl: "Hey, welcome back from Coachella! Want to go to a show with me tonight?"
Boy: "No way, bitch... I'm fucking festifull"