1998青年1999菇凉
[1998 qīng nián 1999 gū liáng]
'1998 Youth 1999 Girl' highlights two different birth years: someone born in 1998 and referring to themselves as youthful ('青年', meaning youth), alongside a reference to 'Girl' ('菇凉', an internet slang term for girls or young women). It might playfully compare maturity levels between slightly differing age groups.