Definition: Transliterated from '玻璃心' meaning 'heart made of glass', this is a code-mixing phrase used by local student Hong Kongers to refer to someone who can be easily hurt and broken, just like as fragile as glass.Usage: E.g. He is very manly but he is actually a polly shum when it comes to love.Synonym: 玻璃心Reference: https://www.timeout.com/hong-kong/things-to-do/cantonese-slang-you-need-to-know-right-now