bouncer
n. countable B1 Intermediate US //ˈbaʊnsɝ// UK //bˈaʊnsɐ// bounc·er
n. a person whose job is to stand at the door of a club or bar. They decide who can enter and make sure people follow the rules inside.
n. A person employed at a licensed premises to control admission and maintain order. The formal job title is typically 'security guard' or 'door supervisor'.
The bouncer checked my ID before letting me into the club.
After the argument started near the bar, the bouncer quickly stepped in and asked the men to leave.
While the venue's bouncer appeared intimidating due to his size, he was known for his professional manner and ability to de-escalate tense situations without using force.
From bounce + -er.
Usage
Informal register; 'door supervisor' is the preferred term in official or legal contexts.