便人

    biànrén

    1. Nounsomebody who happens to be on hand for an errand

    你正好在这儿,能当个便人帮我跑一趟吗?Nǐ zhènghǎo zài zhèr, néng dāng gè biànrén bāng wǒ pǎo yī tàng ma?Since you're here anyway, could you run an errand for me?