In language
Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...

, dysphemism, malphemism, and cacophemism refer to the usage of an intentionally harsh, rather than polite, word or expression; roughly the opposite of euphemism
A euphemism is the substitution of a mild, inoffensive, relatively uncontroversial phrase for another more frank expression that might offend or otherwise suggest something unpleasant to the audience...


Referring to the paper version of an online magazine as the "dead tree edition" or conventional postal mail
Mail, or post, is a system for transporting letters and other tangible objects: written documents, typically enclosed in envelopes, and also small packages are delivered to destinations around the world. Anything sent through the postal system is called mail or post.In principle, a postal service...

 as "snail-mail" are examples of dysphemisms.
While "dysphemism" or "malphemism" may be either offensive or merely humorously deprecating, "cacophemism" is usually deliberately offensive.