The term "narc fly by night" is not a common or widely recognized phrase. It's possible that it could be a combination of two separate terms: "narc" and "fly-by-night." Let's explore both of these terms individually:
Narc: "Narc" is short for "narcissist" or "narcissistic." A narcissist is someone who has a personality disorder characterized by a grandiose sense of self-importance, a constant need for attention and admiration, a lack of empathy for others, and a tendency to exploit or manipulate others for their own gain.
Fly-by-night: "Fly-by-night" is an idiom used to describe businesses or individuals that are unreliable, transient, or disreputable. It often implies that the entity is here today and gone tomorrow, without any long-term commitment or stability.
Based on these definitions, a "narc fly by night" could be a term used to describe someone who exhibits narcissistic behavior and also has a tendency to be unreliable, transient, or untrustworthy. It might suggest that this person engages in manipulative or exploitative behavior while not sticking around for the consequences of their actions.
It's important to note that the term "narc fly by night" is not a widely recognized psychological or clinical term. It may be an informal expression used in specific contexts or communities. If you encounter this term in a particular context, it would be best to consider the context and the intention behind its usage.