Definitions

1. 1. lit. ripe as a melon that rolls from its vine (idiom); fig. to know fluently
2. 2. to know sth inside out
3. 3. to know sth by heart

Components

• 滚 gǔn – to boil
• 瓜 guā – melon
• 烂熟 làn shú – well cooked