长脖子 (cháng bó zi) literally means 'long neck' and functions primarily as an adjective describing something or someone with an unusually long neck. The character 长 (cháng) means 'long', 脖 (bó) means 'neck', and 子 (zi) is a common noun suffix that nominalizes the compound—though in this phrase, the whole expression behaves adjectivally in context (e.g., 长脖子的鸟). It’s most frequently used to describe animals like giraffes, cranes, or flamingos, but can also humorously or critically refer to people who stretch their necks forward while looking at screens or standing.

This term is neutral in register and appears in both descriptive writing and everyday speech. Unlike standalone nouns such as 脖子 (neck), 长脖子 rarely stands alone as a subject; it typically modifies a noun (with 的) or appears in predicative constructions (e.g., 这只鸟真长脖子). It carries no inherent positive or negative connotation, though tone and context may add playful or critical nuance.