滾瓜爛熟

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

to boil / to roll / to take a hike / Get lost!

melon / gourd / squash

soft; mushy / well-cooked and soft / to rot; to decompose / rotten / worn out / chaotic; messy / utterly; thoroughly / crappy; bad

well cooked / to know thoroughly

ripe; mature / thoroughly cooked; done / familiar; acquainted / experienced; skilled / (of sleep etc) deep; profound / also pr. [shou2]