never dip your pen into the company's ink
never dip your pen into the company's ink
vulgar slang Do not have a romantic or sexual relationship with someone you work with. "Pen" is a reference to one's penis. Do you really think it's a good idea to date your boss? I'm a big believer that you should never dip your pen into the company's ink.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.