香港中英夾雜字典

定義: A shortened term of the word 'confirm' in English, used to maximise communicative efficiency and to get the listener to confirm ASAP.

用法: E.g. 下個月個party既日期firm左未呀？ E.g. 你下次個appointment firm左未呀？ E.g. Firm左未呀？快Ｄ啦。

定義: To reserve something, such as an appointment or place, without sounding like it's a date.

用法: E.g. 請問你幫我book左個appointment未? E.g. 聽日book左枱未呀？（訂枱）

同義詞: 訂; 約

參考: https://www.lib.eduhk.hk/pure-data/pub/201902353/201902353_1.pdf