Informal term for someone or something that is first in rank, performance, or preference; a top performer or first-class person or thing.
From 'first' + '-er' (agent suffix creating nouns from adjectives). This informal construction is primarily modern colloquial usage.
Slang terms like 'firster' show how naturally English speakers create comparative vocabulary—if something's excellent, calling it a 'first-rater' or 'firster' just feels right.
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