瘦成闪电劈死你
[shòu chéng shăn diàn pī sĭ nĭ]
Slim as Lightning that Could Kill You: It's a humorous and exaggerated statement. It combines a casual wish to be very slim with a playful menace, conveying lighthearted irritation or competitiveness, depending on the context. It is often used among friends playfully.