noun
rotter
noun
1
A despicable or thoroughly unpleasant person (dated, chiefly British).
"He's a real rotter for cheating on the exam."
How to Use Rotter
Learner’s notesIn plain EnglishAn old-fashioned, mild British insult for someone behaving badly.
When to use it
Distinctly dated and British — sounds like something from a 1930s novel; rare in modern speech.
Word Forms
rotters plural, Rotters plural
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He's a real _____ for cheating on the exam.
Etymology
Formed from rot plus the agent suffix -er.