fisherman's sarcasm

When someone uses a sarcastic statement to elicit a response from someone else to gain knowledge of that person's thoughts or feelings.

Boy: Why are you so down? Sarcastic tone or light sarcastic aura Is it because I like someone else?

Girl: Very defensive tone What?? No way! You're not my type!

Boy: Relax, I was just joking. (Man, she was heated. There's a good chance that she DOES like me based on that defensive response. Thanks to a little fisherman's sarcasm, now I know her true feelings.)