菇凉不是蘑菇凉了
[gū liáng bù shì mó gū liáng le]
Literally: 'gu liang is not mushroom cold'; here '菇凉(gū liáng)' actually means a casual way to call young girls, not mushrooms! This playful username combines a homophonic pun on word 'mushroom' and 'young girl', aiming at breaking stereotypes about romance in an humorous way. The second half ('不是蘑菇凉了 - is not mushrooms have gone cold') plays off a stereotype about romances getting chilly or ending.