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?
by Glory Choe November 5, 2008
To steal, also to rob without mercy, pretty much anything can be jump-jacked, basically the limit is a rocket ship, the U.S.S. constitution was known to be jump-jacked from the harbor by four kids on a field trip to Salem, Ma.(It was so badass) Although, people who jump-jacked from the general store were very lame and felt the wrath of THE RICK G.Usual spots for jump-jacking include Dick's and people's gym lockers.
1."Yo dude, did you hustle that twenty bucks from your mom?"

"yeah, it was like jump-jacking candy from a baby"

2."So Steve, what did you and Alex while you closed at Market Basket?"

"Well first we DILDAR-ed, Shelagged each other, Glynthed it, and then jump-jacked all the cash from the register"
by Nicky killa bee B March 10, 2008
when the guy exsplodes with so much cum it send the gir flying in the air ussaually to her death
sally dies whille jumping jacking
by the jacker12321 January 13, 2016
amazing sex between two amazing people. May happen while:

-being underwater
-being upside-down
-rolling down a hill
-being in public
-being anywhere or doing anything
Jumping Jacks are a really good cardio exercise. We pretty much do them all the time.
by SpongcakeOmNomNom August 25, 2009
the act of spreading jelly on the inner crest of your leg while smearing crunchy peanut butter into those sweaty palms of your hands. When pb&j applied jump up and down while slapping your palms into the inner thigh with someone under you with an open mouth and break in the mouth.

very delicious way to make an excellent pb&j crunchy delight
"I'm full from all those jumping jacks Fred"
by pewpew bam October 5, 2008
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?
by jaffaw February 25, 2012
Named after the Maasai jumping dance performed by the maassai tribe. One's penis is tucked between the thighs and as the person jumps up and down a 'handless wank' is achieved. Usually carried out in frustration after hand functionality is comprimised for extended periods. Quite difficult at first but can be perfected with practice.

The first Maasai jumping-jack was performed by Charley Boorman while filming the long way round through Africa. Charlie was whining about his bitchy little limp wrists one night and Ewan denied him a dutch rudder. So, inspired by the Maasai people he'd seen that day, the Maasai jumping-jack was born.
After that motorbike crash where he broke both his wrists, Paul became a pro at the Maasai jumping-jack.

"If Liam didn't show me how to Maasai jumping-jack myself after I burned my hands, I don't think I could've coped."
by What would Charlie do? November 9, 2012