So, please, explain this phrase to me in detail, and also explain the meaning of the word "slander."
You can find the definition of the word "slander" in Ozhegov's explanatory dictionary.
There is even an online version.
And to say that I used vulgar language (which is still written in the post) is an outright lie.
Obscene language (vulgar language) - (offensive expressions, unprintable profanity) - from English obscene (indecent, dirty, shameless), which, in turn, comes from Latin obscenus (repulsive, indecent, improper) - a segment of abusive language in various languages, including the crudest (obscene, indecently disgusting, vulgar) abusive expressions, often expressing a spontaneous reaction to an unexpected (usually unpleasant) situation.