别把胸大当你发骚的资本
[bié bă xiōng dà dāng nĭ fā sāo de zī bĕn]
Don't think big boobs are your capital for acting out. In a casual or somewhat rude context, it implies that one shouldn’t rely on physical features instead of inner qualities for personal value or advantages. It shows an attitude against judging or evaluating people simply by their appearances.