The term 'flyby-night (unscrupulous)' refers to a person or business that is unreliable and untrustworthy. This term is often used to describe someone who is only interested in making a quick profit without any regard for the quality of their work or the consequences of their actions. The crossword solutions for this term are FLYBY, which is a five letter word. Flyby is an aviation term that refers to a low-altitude flight over a certain area. This term is often used to describe a quick and careless approach to a task or situation.