没有乳沟照样挺没有人鱼自然直
[méi yŏu rŭ gōu zhào yàng tĭng méi yŏu rén yú zì rán zhí]
In this context, it's likely using humorous body-related metaphors. The overall implication is confidence in natural beauty, regardless of conforming to conventional ideals of physical attractiveness.