The term "hihi" is often used as a casual greeting, similar to saying "hi" or "hello." It is commonly found in informal communication, especially in text messages and online chats. The playful repetition of the syllable adds a friendly and cheerful tone to the interaction. In some contexts, "hihi" can also refer to the Hihi bird, a small, native species from New Zealand. Known for its distinctive appearance and melodious song, the Hihi is a symbol of the country's unique wildlife. Conservation efforts are in place to protect this bird due to its declining population.