his favorite dysphemism was to ask for axle grease when he wanted butter.
Examples of dysphemism
dysphemism
It is a dysphemism for hard copy.
From the en.wikipedia.org
Tracy, as Tracie Bennett identifies, is a stereotypical Tracy-normally a dysphemism for an intellectually inadequate, usually blonde, female.
From the en.wikipedia.org
More examples
An offensive or disparaging expression that is substituted for an inoffensive one; "his favorite dysphemism was to ask for axle grease when he wanted butter"
(dysphemistic) substitute a harsher or distasteful term for a mild one ; "`nigger' is a dysphemistic term for `African-American'"
A dysphemism is an expression with connotations that are offensive either about the subject matter or to the audience, or both. Dysphemisms contrast with neutral or euphemistic expressions. Dysphemism is sometimes motivated by feelings such as fear, distaste, hatred, and contempt.
The use of a derogatory, offensive or vulgar word or phrase to replace a (more) neutral original; A word or phrase that is used to replace another in this way
A term with negative associations for something in reality fairly innocuous or inoffensive.
Purposefully unpleasant or objectionable language. For example, Jason's calling the North Carolina statute on official state qualities "crap."
A slanter which replaces one expression with another that carries a more negative association than the original.