The former flanker was furious with some members of his side who went out to party after their win over Wales, despite given strict instructions not to do so.
"I told them they are a bunch of spoiled brats ["sales gosses"]," he said.
"Undisciplined, disobedient, sometimes selfish. Always complaining, always moaning. It has been like this for four years.
"I also told them I have a lot of affection for them. We are in the final but it is a shame they don't look after themselves."
Next week's final will be the last in charge for Lievremont, who is stepping down at the end of the tournament to be replaced by Philippe Saint-Andre.