Misunderstanding (The Witcher 3: Wild Hunt)

Reasonable people, explain to me, to an idiot, what
Spoiler Sigi Dijkstra meant in a conversation after the burning of the barracks of the Witch Hunters. He said something
Spoiler about Geralt's lies and About the theft of the treasury by Geralt himself, and then he mentioned buttercup. question: What is PRECOL?
maybe I don’t understand something or something, but please tell me the moron what the whitefish were talking about. what's the point of saying that?