English idioms : She’s a whistleblower Dialogue Sam: I can’t believe how Clare goes around with Alice. Kathy: Why is that? What’s wrong with Alice? Sam: She’s a whistleblower and she rats on others in her department. Kathy: Then, we have to warn Clare as soon as possible lest she slips up. Sam: Yeah, the sooner the better. Kathy: Actually! I’m afraid Clare is the villain of the piece but not the other way round. Obviously; she is covering up by spreading rumors about Alice. Sam: You don’t say! Vocabulary Go around with: to go places and do things with a particular person. A whistleblower: a person who tells someone in authority about what is happening. Rat on: to inform on (someone). Lest: for fear that. Slip up: make a careless error. The sooner the better: right away; the sooner something [referred to] gets done, the better things will be. The other way round: the opposite of what is expected or supposed. You don’t say: used to express amazement or disbelief.