【寄明信片學廣東話】
10.《二打六 》（Two partner with six）
意思：指無關重要的閒角。本為「二搭六」，即二加上六。由於二加六等於八，不夠十足十，所以引申為可有可無。
Definition: Refers to insignificant people or roles (often used to refer to extras in movie casts).
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