你有男朋友我有蓝朋友
[nĭ yŏu nán péng yŏu wŏ yŏu lán péng yŏu]
'You have a boyfriend, but I have a blu(e)-boy/friend,' where ‘蓝’ (lán) means blue. In modern Chinese slang, this sometimes refers to a close same-sex friend with a special connection or non-traditional relationship type which may hint at deeper affection.