Delirious (adjective)

1. In an uncontrolled state of excitement or emotion.
2. In a state of severe confusion and disorientation, usually as a result of a high fever or an illness.

Origin:

Delirious comes from the latin word "delirium" which means "madness" or "frenzy" and it was adopted in english in the 16th century.

Examples:

1. The fans were delirious with excitement after their team won the championship.
2. He was delirious with fever and didn't know where he was.
3. She was delirious from the pain medication.
4. He was so delirious that he didn't recognize his own family.
5. After winning the lottery, he was delirious with joy.