This is the 6724th most frequent French word.
kevin
In French slang, "Kevin" is a stereotypical name used to mock or characterize someone perceived as lacking sophistication or maturity.
Here, 'Kevin' refers to a proper noun, specifically a person's name, being the subject of the sentence.
Kevin est mon ami.
Kevin is my friend.
In this sentence, 'Kevin' is again used as a proper noun to identify a specific individual.
J'ai vu un kevin arriver en retard.
I saw someone named Kevin arrive late.
The word 'kevin' is used here as a casual or colloquial term to refer to any person named Kevin in a generalized context.