This comes from the show the Vampires Diaries S1E18. Two brothers/vampires Damon and Stefan are talking about Stefan's restraint towards human blood. Stefan: You're really enjoying this, aren't you? Just watching me in a struggle. Damon: Very much so. Stefan: I hate to break it to you, Damon, but I actually have it under complete control. Could you tell me what means "break it" here? "Say it"? Thanks!