LEAVE A BAD TASTE IN YOUR MOUTH
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¹«¾ð°¡°¡ ³ª»Û ÀλóÀ» ³²°å´Ù´Â Ç¥Çö.
...it means that something gave a negative impression or a bad feeling. This idiom is used to express discomfort, disapproval, or something that was unpleasant. 
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(englishdaisies.com)
I got robbed on my trip to Europe. It left a bad taste in my mouth, and I never want to go back to Europe.
À¯·´ ¿©Çà Áß¿¡ °µµ¸¦ ´çÇß¾ú´Ù. ³ª»Û ±â¾ïÀ¸·Î ³²¾Ò°í, À¯·´¿¡ ´Ù½Ã´Â °¡°í ½ÍÁö ¾Ê´Ù. 
I got into an argument with the waitress last time I was there, and I haven't gone back since. It left a bad taste in my mouth.
¸¶Áö¸· °¬À» ¶§ ¿þÀÌÆ®·¹½º¿Í ¾ðÀïÀÌ ÀÖ¾ú°í, ±× ¶§ºÎÅÍ ±×°÷¿¡ °¡Áö ¾Ê¾Ò´Ù. ³»°Ô ³ª»Û ÀλóÀ» ³²°å´Ù. 
¿À´ÃÀº ª°Ô ¿©±â¼ ³¡³À´Ï´Ù. 
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