Puisi berantai is a collaborative form of poetry where each person adds a verse to create a continuous poem. A 'puisi berantai 3 orang santri lucu' would involve three students from an Islamic boarding school crafting a humorous poem together. The humor typically comes from unexpected twists, witty wordplay, and situations relatable to santri life, making it a lighthearted and entertaining performance for both the participants and the audience.