u/Disastrous-Virus-711

https://preview.redd.it/ix1q0vu5c6zg1.png?width=716&format=png&auto=webp&s=3a8f60d53792d8aa7edf83d1c90752a1b5379d41

The idiom, apparently. means "convince me" but that does not make sense in the dialogue's context.