Drop-dead (adjective)

Extremely impressive or beautiful, often used to express admiration or awe.

Origin:

This phrase is from the past participle of the verb "to drop dead", which means to die suddenly and unexpectedly.

Examples:

1. She looked drop-dead gorgeous in her new dress.
2. The view from the top of the mountain was drop-dead stunning.
3. He gave a drop-dead performance in the play.
4. The new car was a drop-dead piece of machinery.
5. The wedding was drop-dead gorgeous, with beautiful flowers and decorations.