小三不骚怎能勾王八
[xiăo sān bù sāo zĕn néng gōu wáng bā]
'A Concubine Has to Be Temptress To Lure a Foolish Man Away.' It references infidelity and suggests manipulation and flirtatious behavior are required for an affair to occur. It’s considered inappropriate but used satirically or colloquially.