let something bad taste is incorrectly written and it should be written as "communicating bad news' being its meaning: Communicate news. Which we know that you cause anguish and pain, and still must be done.
It is said of the subject or event that leaves him one unhappy or uncomfortable, usually passes soon with the passage of time
Receive. Or communicate something to someone who we know is going to cause pain. Disappointment. Or cries. Do it with who you want, causes a bad taste, and anguish of the soul.