There is all kinds of food in the fridge that has gone past its best before date.
We have so many things in the fridge that are past their expiration date
1) There is all kinds of food in the fridge that has gone past its best before date.
「冷蔵庫に賞味期限の切れた食べ物がたくさんあるんだけど。」
all kinds of で「あらゆる種類の」や「たっぷりの」という意味があるので、愚痴っぽく言えるかなと思います。
best before date で「賞味期限」
2) We have so many things in the fridge that are past their expiration date.
「冷蔵庫に消費期限の切れたものが山ほどあるよ。」
expiration date で「消費期限」
ご参考になれば幸いです!