1. A common name for a flasher who is someone who flashes their genitals to a stranger (generally in the street)
2. A form of exercise similar to star jumpes
1. Oh god, did you hear about Nicole getting flashed by a jumping jack?
He flashed her and ran off.
2. Have you done your jumping jacks yet?
an excercise spreading legs and arms out-up and back in -down. Jumping snow angels.
How many jumping jacks can you do in 1 minute?