我们俩能说你什么坏话
“What can we talk about you?”
THE DIALOGUE REEL
我怕你们俩说我坏话
“I'm afraid that you will speak ill of me.”
我们俩能说你 什么 坏话
“What can we talk about you?”
反正
“Anyway,”
“You're being paranoid; we have nothing bad to say about you!”
Using a rhetorical question with '能...什么' is a gentle and typical Chinese way to refute unfounded accusations without escalating tension.
LEARNING CHUNKS & PARTICLES
badmouth / speak ill behind someone's back
Standard everyday phrase for gossiping or saying unkind things about someone.
what could [one] possibly say
Rhetorical construction emphasizing the impossibility or absurdity of an accusation.