trijillin
A trijillin is a fictional, microscopic parasite said to live in the anus of a pubic louse. It is a vulgar way to describe someone as incredibly insignificant or dirty, typically used to insult social outcasts (vicos is Dominican slang for a loser or street person).
Damn, the trijillin bit the crab that lives on my balls.
Automatically translated from Spanish
República Dominicana