Z
It's called the "Zoltan," and it's spreading through Pittsburgh like wildfire.
The Pirates watched Dude, Where's My Car? during a road trip to Atlanta in late April and have since adopted the cult leader Zoltan's hand sign as their official big-play signal. (edit) The sign is made with the left hand on top, right on the bottom, touching extended thumbs to resemble a Z. That shows a Z to other people, if you put the right hand on top you are backwards and showng it to yourself. Since this original answer was posted there has been a barrage of Z (zoltan) merchandise, homemade signs, and the like in the stands. (2012)
bobble sack
It means a fantastic amount of trust and health :)
It's the sign of Zoltan from the movie "Dude Where's My Car?"
peace out homie
It is a Jewish hand sign that symbolizes the letter shin. Which stands for Shaddai meening "God"
It's a gang sign.
A persons hand reaching out to the poor
on the dashboard? i think its the hand brake.
They have 2 different hand signs they do a Lower case d and capital T.
It's V1, which mean Version 1.0
Find out at Steelers.com.
No, they don't.