sit-lé失禮

to lack manners

to lack manners; to be impolite; to breach etiquette; I'm sorry; excuse me

chiefly

English Wiktionary, “失禮” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%A4%B1%E7%A6%AE · confidence: Medium (Wiktionary)