妞让爷亲一个爷给妞笑一个
[niū ràng yé qīn yī gè yé jĭ niū xiào yī gè]
Using dialects and slangs, it translates to 'Give grandpa (an honorific) a kiss and I'll give you (an address indicating intimacy between lovers or friend) a smile.' which portrays casual, flirty interactions within a romantic relationship.