[滚瓜烂熟 / 滾瓜爛熟, gǔn guā làn shú, ㄍㄨㄣˇ ㄍㄨㄚ ㄌㄢˋ ㄕㄨˊ]lit. ripe as a melon that rolls from its vine (成语 saw); fig. to know fluently; to know sth inside-out; to know sth by heart#73694[Add to Longdo]
[陈谷子烂芝麻 / 陳谷子爛芝麻, chén gǔ zi làn zhī ma, ㄔㄣˊ ㄍㄨˇ ㄗ˙ ㄌㄢˋ ㄓ ㄇㄚ˙]lit. stale grain, overcooked sesame (成语 saw); fig. the same boring old gossip#210088[Add to Longdo]