A euphemism for having sex.
Fairly neutral examples of screwphemisms include: 'doing it', 'making love', 'getting some'; and the more marked: 'laying pipe', 'bumping fuzzies'.
1. When someone uses a word or phrase that makes something clean or appropriate into something dirty or awkward.
2. The opposite of a euphemism.
James: Why did you take that biscuit, eat off of it, and THEN ask if someone wanted it?
David: Yeah, I pretty much peed on that tree to show that it was mine.
James: That's disgusting. I hate you and your screwphemisms.