makeweight
noun [ C ] uk/ˈmeɪk.weɪt/ us/ˈmeɪk.weɪt/
凑数的人（或物）；凑足份量之物
something or someone, without much value of its own, that is added so that there is the correct amount or number
She may be the youngest member of the team, but she's no makeweight. 她可能是队里最年轻的成员，但决不是凑数的人。