A person who has no occupation other than housework, yet still wants to appear to be useful, may decide to refer to herself/himself as a "domestic engineer". Such people are also overheard referring to themselves as "professionals" etc.
However official the title "domestic engineer" may sound, there is no engineering involved, and there is no formal education required to obtain this title.
Domestic Engineer: I'm a domestic engineer, and I have an associate's degree in liberal arts.
Actual Engineer: So you're unemployed and you're not an engineer.
Domestic Engineer: <cough> uhmmm...