Showstopper (noun)

1. A person, act, or thing that is so striking or outstanding as to cause a show or performance to come to an end or to stop the audience from leaving.
2. Something that is so impressive that it stops the show.

Origin:

The word "showstopper" is a noun that refers to a person, act, or thing that is so striking or outstanding as to cause a show or performance to come to an end or to stop the audience from leaving. it is a combination of the words "show" and "stopper" which means something that stops or ends a show or performance.

Examples:

1. The singer was a showstopper.
2. The acrobatic act was a real showstopper.
3. The magic trick was a showstopper.
4. The comedian's performance was a real showstopper.
5. The dress was a showstopper on the runway.