外表冷漠内心闷骚型
[wài biăo lĕng mò nèi xīn mèn sāo xíng]
'外表冷漠内心闷骚型' (Cold on the Outside, Wild at Heart) describes someone who appears aloof or reserved but has passionate or rebellious emotions inside. It conveys the duality between outward demeanor and inner character.