Fly by Night
The idiom “fly by night” refers to something or someone that is unreliable, untrustworthy, or not dependable. It suggests that the person or thing in question is fleeting, like a bird that only comes out at night and quickly disappears. When describing a business as “fly by night,” it implies that it operates in a shady or temporary manner, without a solid foundation or long-term commitment. This idiom is often used to caution against dealing with individuals or organizations that may not have staying power or may not fulfill their promises. For example, if someone describes a company as “fly by night,” they are warning that it might not be around for long or may not deliver on its services or products.
The origin of this Idiom dates back to the 16th century when it was used to describe dishonest traders who would quickly set up shop, make a profit, and then disappear before customers realized they had been swindled. Over time, the term evolved to encompass any person or entity that operates in a transient or unreliable manner.