The bad taste in your mouth just after waking up from a nap.

睡觉刚醒来之后嘴巴里那股难闻的味道。

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Either way, if something leaves a bad taste in your mouth, it isn't good.

不管怎样，如果某事“在你嘴里留下不好的味道”这都不是什么好事。

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Of course, you also can eat something that literally leaves a bad taste in your mouth.

当然，也可以指字面上的意思，即吃到味道很糟糕的东西。

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And even though they have some good prospects coming, just the entire tenor, it leaves a bad taste in your mouth, as anyone who has tried to eat an aggressive game fish can tell you.

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This video is worth watching again, however, just to put that bad taste back in your mouth.

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