尻しりが長ながい

expression

overstay one's welcome; be a guest too long

Idiomatic expression literally meaning 'one's buttocks are long', used when someone stays too long as a guest, especially in a neighbor's house or similar informal visit.

• 隣となりの奥おくさんはいつも尻しりが長ながくて、なかなか帰かえらない。