You'll wash it all down with the a diet drink.

You'll wash it all down with the a diet drink.
You'll wash it all down with the a diet drink.

You'll wash it all down with the a diet drink.
wash down 是俚语,表示喝某种液体以帮助吞咽
所以整句意为：你可以用无糖饮料把它都吞下去.

用一瓶营养饮料就可以把它全去除。