The act of calling one out on telling half-truths to a story in order to make the person appear the victim by pointing out facts that conflict with parts or all of their story.
Wayne: "My brother bullied me because I didn't give him a piece of my birthday cake."
Nick: "Actually, this is only partly true. Your brother was hoping you'd share your cake but when you didn't, you had a tantrum because you were told it was nice manners to share."
Brendan: "Wayne got per-owned!"