有了女友还装单身有了男友还装一人
[yŏu le nǚ yŏu hái zhuāng dān shēn yŏu le nán yŏu hái zhuāng yī rén]
It describes a situation where a person pretends to be single even though they already have a girlfriend/boyfriend, hinting at deception or playful attitude towards relationship status.