leave a sour taste in (one's) mouth

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leave a sour taste in (one's) mouth

To have a persistent negative effect on someone after an offending incident has ended. I know Kelly's your friend, but she was so rude at dinner—it just left a sour taste in my mouth. Of course Andrew not inviting me to his party leaves a sour taste in my mouth.
See also: leave, mouth, sour, taste