心凉过薄荷
[xīn liáng guò bó hé]
'Cooler Than Mint' directly translates into being cooler than mint. However, the word 'heart' at the beginning brings emotional depth here. Mint usually has a cooling effect making one feels refreshed; hence the name signifies inner feelings cooler or even colder, possibly indicating indifference towards the outside world, emotional chillness following certain experiences, or trying to appear nonchalant to avoid getting hurt.