来吃顿便饭 meaning in English

come along and take potluck

Come along and take potluck .
来吃顿便饭。
Last winter , you promised to have a family dinner with us
去年冬天，你答应要上我们这儿来吃顿便饭
" you are quite a visit in my debt , mr . bingley , " she added , " for when you went to town last winter , you promised to take a family dinner with us , as soon as you returned
于是她便说道： “彬格莱先生，你还欠我一次回拜呢，你去年冬天上城里去的时候，答应一回来就上我们这儿来吃顿便饭。