Cách sử dụng
To "be on the door" means to work as a bouncer or security guard at a club, bar, or other event venue. This expression is used to refer to someone who is responsible for checking people's IDs, ensuring that only authorized people are allowed in, and handling any unruly behavior if necessary. It is important for English learners to understand this expression if they plan to work in the hospitality or entertainment industries, or if they frequently attend nightclubs or concerts.