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.