Sexual slang
Sexual slang is a set of linguistic terms and phrases used to refer to sexual organs, processes, and activities; they are generally considered colloquial rather than formal or medical, and some may be seen as impolite or improper.
Related to sexual slang is slang related to defecation and flatulence (toilet humor, scatolinguistics). References to the anal tract are often given a sexual connotation in the context of anal sex (in particular, in a context of male homosexuality).
While popular usage is incredibly versatile in coining ever new short-lived synonyms, old terms with originally no pejorative colouring may come to be considered inappropriate over time. Thus, terms like arse/ass, cunt, cock and fuck should not be considered "slang," since they are the inherited common English terms for their referents, but they are often considered vulgarisms and are replaced by euphemisms or scientific terminology in "polite" language.
Pejorative usage
Terms of disparagement are used to refer to members of a given sexual minority, gender, sex, or sexual orientation in a derogatory or pejorative manner. They are used as insults by persons who are not or do not wish to be associated with the group being disparaged. For example, queer can be used as an insult by those seeking to deprecate homosexual, bisexual, and transgender or transsexual people, but the word has also undergone reclaiming, such that it can be used positively within that community. Which terms are used as slurs is determined by a society's or subculture's set of values, especially its biases against genders (sexism). For example, words such as whore and slut are typically used to refer to sexually promiscuous women.