He was wearing a chavvy fake gold chain that looked tacky.

chavvy 是形容词，源自英国俚语 chav（指那些喜欢炫耀、品味低俗的年轻人），加上后缀 -y 构成形容词，表示"俗气的、廉价的、品味差的"，常用来形容那些试图显得富有但实际很廉价的服饰或物品。