rotter

Calling someone a "rotter" is not polite. It is an old-fashioned way, especially in British English, to say that a person is nasty, dishonest, or not to be trusted. Sometimes it was used in a light, playful way, such as for a mischievous child called a "little rotter." But it could also be serious. If you called someone a "complete rotter," you meant they had behaved badly and let people down.

The word "rotter" describes a person considered despicable, untrustworthy, or thoroughly bad. While it sounds rather quaint today, it was once a common insult, particularly in British English from the early 1900s through the mid-20th century. It carries a sense of moral decay—like something is "rotten" at its core.

Unlike harsher insults, "rotter" often had a playful edge when used amongst friends or to describe minor misbehavior. A mischievous child pulling pranks might be affectionately called a "little rotter." However, the term could also be deeply serious. Accusing someone of being a "complete rotter" implied they were fundamentally dishonest, selfish, or cruel.

The origin is thought to come from the idea of something decaying or spoiling—hence the connection to "rot." It suggests that the person's character has gone bad. You might read it in older detective novels or period dramas where a villainous character is described as a "sneaky rotter" or someone who "behaved like a rotter."

While less common today, understanding "rotter" gives you a glimpse into how language evolves and how insults can carry both severity and a touch of old-fashioned charm. It's a word that evokes a specific era and a particular type of disapproval—a bit more colorful than simply calling someone "bad."