Streaker (noun)

1. A person who runs naked in public, especially as a form of protest, exhibitionism, or entertainment.
2. A person who makes a sudden, rapid run or dash, especially in an unexpected or unexpected manner.

Origin:

Derived from the verb 'streak', meaning to run or move quickly or suddenly.

Examples:

1. The streaker caused a commotion when he ran onto the field during the Super Bowl.
2. The streaker was tackled by security guards and escorted off the premises.
3. The streaker was fined for public indecency and banned from the stadium.
4. The streaker's antics were a source of amusement for some, but others were shocked and offended.
5. The streaker's sudden dash across the finish line caught everyone off guard and added an unexpected twist to the race.