闺蜜是到死都一起猥琐的人
[guī mì shì dào sĭ dōu yī qĭ wĕi suŏ de rén]
This name uses exaggerated language that could mean close friends ('gals'/'besties') share a level of comfort so profound they'd remain weird or naughty together no matter what. However, '猥琐' can have derogatory connotations, therefore it needs context to accurately translate its nuance.