an important or influential (and often overbearing) person
"The new hotel policy requires all VIPs to reserve their own dining tables, a rule that clearly annoyed some of them since they expected special treatment."
Initialism of very important person.
"The celebrity was treated like royalty because she is a VIP at every event they attend."
In plain English: A VIP is someone who gets special treatment because they are very important to an event or organization.
"He wore his VIP badge with pride at the exclusive event."