If you're a reveler, you're celebrating something or noisily enjoying yourself. A lively birthday party is full of revelers.
You're most likely to see revelers during a festive occasion, like a block party or a family reunion at a roller rink. A reveler is easy to spot — she's probably laughing or talking loudly. Reveler comes from the verb revel, "to enjoy one's self in a noisy way," from the Old French reveler, also spelled rebeller, "be disorderly, make merry, or be riotous." Reveler shares a Latin root with the word rebel.